RE: CVOICE book: VoATM and VoFR [7:53909]
Priscilla wrote:
> I have gotten quite a few of these simple voice/data
> networks up and running. It's very easy. There is no Call
> Manager! And, as you mentioned, the major benefit is that
> you bypass long-distance charges because you simply use
> the existing data network. You may need to prioritize
> voice, and break up big data packets to get the low level
> of delay required for voice, but other than that, there's
> not much to it
For many purposes there's not much for the network
administrator to do, as you mention. In other contexts
such as a company that has a bunch of expensive PBXs that
have to be integrated onto the WAN portion of the data
network, one must exercise care to benefit from bypassing
PSTN and other legacy solutions.
Later steps can be taken to evolve to the full AVVID
solution discussed in the CIPT book, but for now I have to
focus on the Cvoice model, namely, using VoFR, VoATM and
VoIP to stop the hemorrhage of funds into legacy
long-distance voice networking. Getting those PBXs talking
to each other over an FR or ATM cloud is no small matter,
and the economic benefit is huge.
-- TT
Original Message
Subject: RE: CVOICE book: VoATM and VoFR [7:53567]
Date: 19 Sep 2002 00:29:26 -
From: [EMAIL PROTECTED] ("Priscilla Oppenheimer")
Organization: GroupStudy.com Discussion Groups
Newsgroups: groupstudy.cisco
Tom Scott wrote:
>
> Having asked about VoMPLS transcoding from analog voice to MPLS
> frames without intermediate IP packets, my lab partner noticed
> that the CVOICE book (edited by Steve McQuerry etal) discusses
> VoFR and VoATM (chapters 8 and 9):
>
>
> analog+---+ +---+ analog
> phone A1 | | ATM | | phone B1
> ... | rtr A | or FR | rtr B |...
> analog | | cloud | | analog
> phone Ai +---+ +---+ phone Bj
>
>
> Are we reading this correctly, that the analog phones plug into
> the cisco routers and the analog voice traffic is transformed
> into FR frames or ATM cells, with no IP packets in between?
> It makes sense to do it that way in some applications. For
> example, if you have a call center in a distant suburb across
> a LATA line or two, that services a metropolitan area, then
> you'd want to bypass long-distance charges if at all possible.
>
> This seems like an easy way to do it. But what handles the
> call control? Does the router do that? Some of the diagrams
> in the CVOICE book have no PBX (or CCM) in them. Does the
> router translate the call-control signaling from the analog
> phone into corresponding pass-through signaling in the ATM/FR
> packets (sort of like user-to-user signaling that could be
> passed through SS7, in this case the users are the routers
> and the network is the ATM/FR switches)?
Yup, you got it, although it may be even simpler than you imagine.
Before AVVID, Cisco did VoIP, VoFR, and VoATM, as discussed in the CVOICE
class. With these solutions, you simply connected analog phones to FXS ports
on routers. The routers digitized and compressed the dialed digits and the
voice itself and packetized it. If it was VoATM or VoFR, there was no IP.
The data was simply put into data-link-layer frames (or cells with ATM).
You asked about the call-control signaling from the analog phone, but how
much would there be? These phones would be your basic $5.99 KMart special
with no bells and whistles, so to speak. The router provides dial tone and
picks up the dialed digits and forwards them to the other router.
As you can probably tell, I'm not a telepony expert, but I have gotten quite
a few of these simple voice/data networks up and running. It's very easy.
There is no Call Manager! And, as you mentioned, the major benefit is that
you bypass long-distance charges because you simply use the existing data
network. You may need to prioritize voice, and break up big data packets to
get the low level of delay required for voice, but other than that, there's
not much to it. The original CVOICE class covered only these types of
solutions and I'm sure the book still has a lot of this flavor, although
both the book and the newer version of CVOICE also cover newer solutions too
these days probably.
___
Priscilla Oppenheimer
www.troubleshootingnetworks.com
www.priscilla.com
>
> -- TT
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CVOICE book: VoATM and VoFR [7:53567]
Having asked about VoMPLS transcoding from analog voice to MPLS frames without intermediate IP packets, my lab partner noticed that the CVOICE book (edited by Steve McQuerry etal) discusses VoFR and VoATM (chapters 8 and 9): analog+---+ +---+ analog phone A1 | | ATM | | phone B1 ... | rtr A | or FR | rtr B |... analog | | cloud | | analog phone Ai +---+ +---+ phone Bj Are we reading this correctly, that the analog phones plug into the cisco routers and the analog voice traffic is transformed into FR frames or ATM cells, with no IP packets in between? It makes sense to do it that way in some applications. For example, if you have a call center in a distant suburb across a LATA line or two, that services a metropolitan area, then you'd want to bypass long-distance charges if at all possible. This seems like an easy way to do it. But what handles the call control? Does the router do that? Some of the diagrams in the CVOICE book have no PBX (or CCM) in them. Does the router translate the call-control signaling from the analog phone into corresponding pass-through signaling in the ATM/FR packets (sort of like user-to-user signaling that could be passed through SS7, in this case the users are the routers and the network is the ATM/FR switches)? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53567&t=53567 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: MPLS for 2500 [7:53353]
If I understand this correctly, cisco routers support this RFC 3032 feature. Then the next question is, Do any Cisco routers support VoMPLS, where lines would bring analog or digital voice into voice ports and the router would translate (transcode?) the stream into bits that are encapsulated as the payload of MPLS frames in accord with MPLS Forum Implementation Agreement dated July 27, 2001? I'm not sure about the addressing and other details, but I'd just like to know if cisco routers can do this wihtout the intervention of IP packets. (And approximately what classifying, marking and queueing would the routers use on the PPP links if other traffic such as IP or IPX non-voice data were also present. But that is asking too much at this point. Maybe later.) -- TT Larkin, Richard wrote: > Definitely yes with PPP - a new NCP (MPLSCP) provides indication that the > frame is an MPLS frame instead of an IP or IPX frame. MPLS is treated as > just another network layer protocol. > > Not sure about HDLC though. > > Richard Larkin > > -----Original Message- > From: Tom Scott [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, 17 September 2002 4:41 AM > To: [EMAIL PROTECTED] > Subject: Re: MPLS for 2500 [7:53353] > > > MPLS'ers, > > Assuming you find the IOS that supports MPLS on the 2500 > or 2600, is it possible then to set up a little MPLS cloud > with HDLC or PPP links connecting the routers? > > Alternatively, we have used the MPLS routers as access > devices to connect to a FR cloud (ATM too but we don't have > the ATM switches yet). But we'd like to just use three or > four inexpensive 2500/2600 routers with HDLC/PPP serial > links as the cloud. Can it be done? > > -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53524&t=53353 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Voice solution - help required [7:53469]
Shane, Niraj, In addition to the information Niraj requested, it would be helpful if you can compare the real-life situation you're dealing with the discussion of trunk managment and conditioning in the V book (pp. 571-702): HTML version: http://cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fvvfax_c entire book in one PDF file: http://cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fvvfax_c/vcfbook.pdf I'd like to know how closely the hypothetical examples in the chapters "Configuring Trunk Connections and Conditioning Features" and "Configuring PBX Interconnectivity Features" fit to your situation. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53479&t=53469 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Voice Certification [7:53165]
John Huston wrote: > 1.) What is good self study material for the Deploying Quality of Service in > Enterprise Networks Exam (DQOS 9E0-601) test? If you want a book that corresponds closely to the official exam blueprint, get the Q book (qcfbook.pdf): http://cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/index.htm http://cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/qcfbook.pdf The other book, the one by Vegesna, seems to be popular, but for topic-by-topic coverage of the blueprint, there's nothing better than the Q book. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53186&t=53165 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ITS router not loading firmware image into 7960 phone [7:53152]
commands in the log. But I can assure you that we put a copy of each of these files in the flash: directory: * P004G302.bin * ephone_admin.html * normal_user.html * admin_user.html * telephone_service.html * logohome.gif We listed P004G302.bin in the tftp-server commands (see log). However, according to the ITS documentation (p. 142, "Cisco IOS Telephony Service Version 2.01", ipkey2.pdf file), the transport protocol for getting the image from the router to the phone is HTTP. Numerous other passages refer to TFTP as the transport for the image, but we suspect that HTTP actually does the work. To cover all the bases, we listed the image in the tftp-server commands, turned on the HTTP process with the "ip http server" command, and set the HTTP root with the "ip http path flash:" command. Next week when we get back to the lab we plan to use the debug command, but we will probably have to return the phones to their owners before then. If anyone sees the mistake in our configuration, we would appreciate hearing from you. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53152&t=53152 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
ITS router not loading firmware image into 7960 phone [7:53141]
Does anyone have experience with ITS (native IOS Telephony Service)? If so, please take a look at the log at: http://vedatel.com/Misc/its-config-public.txt We are configuring only one phone at this point in time. All we want to do is to get the phone to downgrade from the firmware it was using in a CallManager environment to the firmware supported by the ITS image running in our 2600 router. The 2600 is running this IOS: c2600-is-mz.122-11.T.bin. The image we want to load into the 7960 is: P004G302.bin. See the commands under the telephony-service command in the log for our configuration of these goals. Our problem is that the old firmware image is not replaced by the P004G302 image. Does anyone have experience with this kind of problem and a solution to it? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=53141&t=53141 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
tr: QOS ?? help needed [7:52961]
Andy,
This is a problem for Q Man! (whoever and wherever he is)
But seriously, maybe we could work this one out on the list.
May I suggest that you use the "modular QoS CLI". This involves
three steps:
First, classify the packets using ACLs and the class-map command.
Second, apply actions to the class using the policy-map command.
Third, attach the policy to an interface (input or output).
Fourth, enjoy your network.
Anyone else want to take it from there?
-- TT
Original Message
Subject: QOS ?? help needed [7:52961]
Date: 10 Sep 2002 00:17:37 -
From: [EMAIL PROTECTED] ("crow")
Organization: GroupStudy.com Discussion Groups
Newsgroups: groupstudy.cisco
Hi Group,
i am having problems to solve the following scenario.
kabelmodem-(E0)router2501(E1) -
witch - win2k-pro (private address range)
( internetaddress )( using
- win2k-server (private address range)
i want to prefer udp-packets with port xxx over all other traffic (specially
http)
(leaving the win2k-pro in direction to kabel-modem, with all other traffic i
mean traffic from win2k-pro and win2k-server,
specially http)
is this possible?
i tried priority-queueing:
priority-list 1 protocol ip high list 120
priority-list 1 protocol ip normal
priority-list 1 protocol ip low tcp www
access-list 120 permit udp host 10.0.0.2 any range
int e 0
priority-group 1
but the result wasn' t efficient.
also i tried route-maps with precedence flash-override as high and routine
as low,
but i dont know whether it is the right way solving the prob nor the
configuration works.
i was searching on the cco and trying to solve the problem for many hours.
i need your help. any suggestions?
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RE: Callmanager installation [7:52946]
Tim, Stephane,
We had the same problem when installing CCM 2.4.5 on our Win2k server
in the Academy lab. It appeared that the installation aborted when it
gave us the message about the Service Pack, although it may only have
been a warning / bogus message, not an abort. In any case, we're going
to start again tomorrow and we'll see where it takes us.
The reason we had to start with 2.4.5 was simply that all the later
versions were updates. The only full installation, not an update,
was 2.4.5. If there is a later version that we can begin with, please
specify what it is. We have access to all versions through our site
license.
-- TIA, TT
Original Message
Subject: RE: Callmanager installation [7:52946]
Date: 9 Sep 2002 22:07:45 -
From: [EMAIL PROTECTED] ("Tim Medley")
Organization: GroupStudy.com Discussion Groups
Newsgroups: groupstudy.cisco
Stephane,
CCM 2.4 was designed for Windows NT 4, and so you may be getting a bogus
error. I believe it is asking for Win2k sp4, but I don't think there is a
Win2k sp4 yet, they just released sp3 a few weeks ago.
If you are attempting to learn Call Manager, I wouldn't waste my time with
CCM 2.4 it is entirely different that CCM 3.x
tim
Tim Medley, CCNP+Voice, CCDP, CWNA
Sr. Network Architect
VoIP Group
iReadyWorld
-Original Message-
From: Stephane LITKOWSKI [mailto:[EMAIL PROTECTED]]
Sent: Monday, September 09, 2002 3:53 PM
To: [EMAIL PROTECTED]
Subject: Callmanager installation [7:52946]
I tried to install Callmanager 2.4.5 on a Windows 2000 Server with SQL
Server 7 (upgraded to SP4). And when I launch setup, it says that I need
Service Pack 4 at least for Y2k updates. What does it mean ? Service Pack
for what ?
thanks for help.
--
Stephane LITKOWSKI
Student in a French computer science school
EPITA Telecom & Network specialization (Paris, FRANCE)
CCNA + CCNP
EMail : [EMAIL PROTECTED]
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Re: CCIP Cisco press [7:52878]
YASSER ALY wrote: > Do you think IP Quality of Service is enough for the QoS portion? Take a look at the Q Book: http://cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/index.htm http://cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/qcfbook.pdf Comparing the TOC of the Q Book to the QoS part of the MCAST+QOS exam blueprint, there's a close correspondence, even better than the book by Vegesna. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52932&t=52878 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE and voice. [7:52860]
Howard C. Berkowitz wrote: > At 8:56 PM + 9/8/02, Chuck's Long Road wrote: >>http://www.cisco.com/warp/public/625/ccie/certifications/routing.html#45 ) >>it would be possible for there to be IP phones. However, and again checking >>CCO ( >>http://www.cisco.com/warp/public/625/ccie/certifications/voice_faqs.html#2 ) >>at present the only phones are analogue. >> >>Cisco tends to make announcements as to content changes several months in >>advance. Until it apears on CCO, all one has is speculation. >> >> > That information should pretty much tell you how to prepare. Am I reading the info at the URLs correctly: If analog phones are or might be used in the CCIE labs, how would that work? The only thing I can think of is a switch that has an analog DSP with an analog phone plugged into it, or a router that has an FXS or FXO module. Is that right? Who knows, they might even change the name of CCIE R/S to CCAE (Cisco Certified AVVID Expert). Not really, but it sure looks like that cert requires more AVVID at each rev. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52920&t=52860 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
experience with modular QoS CLI [7:52898]
Does anyone on this list have experience with modular QoS CLI in a production network? I'd like to know what issues you deal with that might help us as we start implementing and testing. I'd rather stay on a per-device level for now; that's the reason for using the CLI. As long as we're dealing with only a few routers, we're willing to take the time to configure each one separately. Later we might move to some of the management tools like QDM and QPM. If you also have experience with those tools, I'd like to hear the story, the Good, the Bad and the Ugly. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52898&t=52898 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Network Management Sofware [7:52886]
Linda & Vaughan Beckerling wrote: > Anyone know of some great shareware/freeware or low cost Network management > software. To run on win 2000 server/desktop and analyse traffic flows and > report link state. http://opennms.org http://www.sortova.com/tools/opennms/ I've seen it on Unix platforms: Solaris, Redhat, Mandrake. Not sure about Windows. Please post further information if you get any. -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52893&t=52886 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: FXS and Key System connection [7:52795]
Chris Charlebois wrote: > In a word, no. The only way to get analog lines into a 26xx series router > (or 36xx for that matter) is with a NM-1V (or -2V) and an FXO (or FXS) VIC. > The NM-1V alone is running between $300 and $500 on E-bay. The FXO/S will > probably be another couple hundred at least. > > But, yes, it seems that ITS will allow you to route IP phone calls to and > from analog lines with the proper hardware. I haven't worked with ITS, much > but the description seems to indicate that. However, I don't know if ITS > will really help you. ITS is a nickle answer to the $64,000 question, and > it will not help in passing the CIPT exam. Chris, Thanks for the info about the FXO/FXS modules. We probably won't buy them for the Academy lab but there may be some small businesses and schools that are interested. Our reason for working on the ITS keyswitch is an odd combo of charity and economic necessity: Local schools, especially those that are not supported by taxes, can't afford the investment for a CallManager. But some already have a 2600 or 3600 router connecting them to the Internet. All we have to do is purchase a switch that supports QoS, install the ITS feature set image for the router, and voila, the school can support 24 IP phones (48 if we can find a used 3640 or 3660 in good condition). We run it all on the existing cat5/5e data network cable. The only issue is the cost of the phones. (Can't do SoftPhone because it's supported only by CallManager.) That brings up the next question: Can anyone recommend a source of reliable used Cisco IP phones? Just thought I'd ask ... :-) -- Cheers, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52863&t=52795 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: FXS and Key System connection [7:52795]
Peter Walker : [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], TISCA wrote: > Nope, I think you got that the wrong way round. > > FXO looks like an analog phone. > FXS is the interface you plug a phone into. Peter (and others using keyswitch ITS routers), Just to make sure I'm using the right terminology, are you referring to ITS (IOS Telephony Service) when you mention the "keyswitch"? Next question, assuming that we're talking about the ITS keyswitch functionality in router images like the 2600/3600 routers (for example the "is" image c2600-is-mz.122-11.T.bin): We want to get some analog phones working in the ITS exercise set up at the local Cisco Academy. Budget is limited (that's an understatement). Does Cisco make an affordable (say, less than $100 or $200) module for our 2621 that we can plug analog phones into, and will those analog phones communicate with a couple of IP phones (7960, 40, 10) that will be connected to a switch that's plugged into the 2621? -- TIA, TT P.S. How are preparations for the CIPT going? Do you have a CallManager to practice with? I think that's key to the exam, actually configuring the CCM software and using it with SoftPhone and 79XX IP phones. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52795&t=52795 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VOIP and subnets [7:52688]
Larry Letterman wrote: > Dont confuse VOIP with AVVID/IP Telephony.. > > To run IP Telephony over a cat 5K, use a secondary IP > address on the router interface that routes the vlan for > the switch in question. You will need a DHCP server that has > both primary and secondary scopes, and the primary will service > the data devices and the secondary will service the phones based > the dhcp-150 request coming from the phone. Larry, Can you refer me to documentation on the difference between VoIP and AVVID/IP Telephony? Are either of these related to ITS (IOS Telephony Service) that provides keyswitch functionality in the router image? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52758&t=52688 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Failed in QOS :(( [7:52600]
I wrote: > If you have the time, it might help if we can figure out how close > the exam is to the blueprint of the DQOS 9E0-601 exam and the offical > course description: > > http://www.cisco.com/warp/public/10/wwtraining/certprog/testing/current_exams/9E0-601.html > http://www.cisco.com/pcgi-bin/front.x/wwtraining/CELC/index.cgi?action=CourseDesc&COURSE_ID=1582 Ali, Chuck and CIPTSS candidates, I think I found the online book that covers just about everything listed in the exam blueprint: the Q Book. The official, long title is: "Cisco IOS Quality of Service Solutions Configuration Guide". You can get it online at: http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c It's almost a one-to-one match with the blueprint. Exceptions: the online guide (Q Book) has a part (six chapters) on signalling and RSVP; there's nothing like that in the blueprint (count ourselves lucky for that!). In addition, the Q book discusses the QDM but none of the other CiscoWorks management tools listed in the blueprint (QPM, IPM, SMS). I'm not sure what's going on with SAA (blueprint) and the modular QoS CLI (Q Book). Anyone else know? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52700&t=52600 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VOIP and subnets [7:52688]
Joseph Malin wrote: > FYI: Cisco mentions both options in: > http://www.cisco.com/univercd/cc/td/doc/product/voice/ip_tele/avvidqos/qosphone.htm That's a good discussion. Also see the book (available in PDF) that the chapter is taken from: http://www.cisco.com/univercd/cc/td/doc/product/voice/ip_tele/avvidqos Another source in this discusssion is official CIPT coursebook by David Lovell: Cisco IP Telephony, ciscopress.com. On p. 383 he cuts the pie in three: * New subnet in different IP address space. * Old subnet that the existing data endsystems are using. * New subnet in the existing IP address space. According to Lovell (p. 383): "Because of the IP address space concerns, as well as the requirement of separation between the voice and data networks for administrative and QoS reasons, Cisco recommends you create a new subnet [first option, I think] for the Cisco IP phones." He also discusses "automatic subnet placement". I'd appreciate if someone would explain that. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52695&t=52688 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: traffic shapping and rate-limit [7:52468]
Mohamed Saro wrote: > what is the difference and the direction of rate-limit and traffic shapping If you're looking for definitions, try this from RFC 3290 (p. 12): Diffserv nodes may apply shaping, policing and/or marking to traffic streams that exceed the bounds of their TCS in order to prevent one traffic stream from seizing more than its share of resources from a Diffserv network. In this model, Shaping, sometimes considered as a TC action, is treated as a function of queuing elements - see section 7. Algorithmic Dropping techniques (e.g., RED) are similarly treated since they are often closely associated with queues. Policing is modeled as either a concatenation of a Meter with an Absolute Dropper or as a concatenation of an Algorithmic Dropper with a Scheduler. These elements will discard packets which exceed the TCS. The glossary (section 2) also defines "work-conserving" and non-work-conserving", regarding whether or not packets will continue to be sent when the link is idle: Non-work- A property of a scheduling algorithm such that it conservingservices packets no sooner than a scheduled departure time, even if this means leaving packets queued while the output (e.g., a network link or connection to the next element) is idle. Work- A property of a scheduling algorithm such that it conservingservices a packet, if one is available, at every transmission opportunity. Shaping The process of delaying packets within a traffic stream to cause it to conform to some defined temporal profile. Shaping can be implemented using a queue serviced by a non-work-conserving scheduling algorithm. Those are the accepted definitions for purposes of clarifying the discussion of Diffserv. If someone wants to use a different definition, no problema, but we only need to know what it is. "All definitions are created equal." Some are used more than others, depending on the discussion. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52679&t=52468 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Failed in QOS :(( [7:52600]
Ali Khalid Muhammad wrote: > I failed in QOS exam a few days back coz there is no specific book and as > well paper is new and no one around has taken it. So no idea about it at > all Ali and Chuck, If you have the time, it might help if we can figure out how close the exam is to the blueprint of the DQOS 9E0-601 exam and the offical course description: http://www.cisco.com/warp/public/10/wwtraining/certprog/testing/current_exams/9E0-601.html http://www.cisco.com/pcgi-bin/front.x/wwtraining/CELC/index.cgi?action=CourseDesc&COURSE_ID=1582 Without violating the NDA, can you tell us how the exam compares to the lists at those URLs? I'm writing a summary QoS, policy, Diffserv and Intserv. I found that the single best perspective for that summary has been the Diffserv model in RFC 3290 (and the management discussion in RFC 3289): http://ietf.org/rfc/rfc3290.txt http://ietf.org/rfc/rfc3289.txt The model is somewhat abstract, but it really helps me make sense of the confusing QoS mess (see especially figures 1 and 2). It breaks QoS routing into ten "functional datapath elements" and the traffic control blocks (TCBs) that are constructed from the elements: Action-conditioning elements * classifiers * meters Action elements --- * DSCP markers * counters * droppers absolute * multiplexors * null action Queueing elements - * droppers algorithmic * queues (buffers) * schedulers For example: I was having difficulty with policing and shaping. Then I ran across this paragraph (RFC 3290, section 3.2, p. 12): Diffserv nodes may apply shaping, policing and/or marking to traffic streams that exceed the bounds of their TCS in order to prevent one traffic stream from seizing more than its share of resources from a Diffserv network. In this model, Shaping, sometimes considered as a TC action, is treated as a function of queuing elements - see section 7. Algorithmic Dropping techniques (e.g., RED) are similarly treated since they are often closely associated with queues. Policing is modeled as either a concatenation of a Meter with an Absolute Dropper or as a concatenation of an Algorithmic Dropper with a Scheduler. These elements will discard packets which exceed the TCS. That helps, doesn't it? I mean, if you can get a feel for the ten basic elements / operations, the TCBs, regardless of how complex they might be, can all be constructed from simple elements. The other question I have is: How much emphasis is put on the QoS management tools: QDM, QPM, SAA, IPM, SMS? They are all in CiscoWorks 2000 (SAA is native to IOS). Did you have an opportunity to practice QoS management with the tools in CiscoWorks? If not, do you think it would have made the test easier if you had access to those tools? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52662&t=52600 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Tonight's Homily - Keeping an Even Keel [7:52651]
Chuck's Long Road wrote: > I heard a rumor today that > voice is worth a lot more points than it was last time through. Good. > Counting on my fingers, I'm estimating that 60% of the next Lab I see will > be this good clean difficult but relevant stuff. Speaking of voice and its relationship to CCIE preparations: My lab partner and I started studying for the CCIE written exam this summer. We got the Bruno book and read it cover to cover -- well, maybe we skipped a few sections on SRB and other legacy issues. When we got to chapters 11 and 12 the world changed right before our eyes. The reality of AVVID struck. We put the CCIE on hold for a few months (years?) and are focusing on CIPTSS and, later, some sort of video certification. (That reminds me, I don't remember running across any video certs yet. For voice and general QoS knowledge, there's CIPTSS, CIPTOS, and CIPTDS. If someone would refer me to similar certs for video, I'd be most grateful.) My guess is that the more one learns about voice and video and the QoS mechanisms that support them in the network infrastructure, the better prepared for the CCIE exams he'll be. The Internet supports convergence; IP-based IETF networks are the workhorses that are fulfilling the vision of (B)ISDN without the lethargic baggage and behind-closed-door attitude of the ITU. For Cisco users and customers, this all boils down to AVVID. I wouldn't be surprised if they renamed the CCIE "CCAE" (Certified Cisco AVVID Expert). Just kidding about that, but AVVID will be one of the most important focal points for CCIE students. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52658&t=52651 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: upgrade DRAM memory on 2600 [7:52632]
Heffner Christopher wrote: > Then go to www.crucial.com for the 32 mb dram simm or simm(s) that you need > depending upon your current router configuration. The Crucial Tech part number is CT134951; Cisco P/N is MEM2600-32D=. It's a 32 MB 100-pin DRAM DIMM stick. Thanks to you and Chris for the references. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52642&t=52632 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
upgrade DRAM memory on 2600 [7:52632]
Hardware Enthusiasts, We want to upgrade DRAM (volatile) from 32 MB to 64 MB on our 2600 router (I think it's a 2621). The existing DRAM chip (clip? or whatever it's called) has this written on it: 69000178 - C01 - CSC 8MX32 EDO DIMM 0031P0245 Something like that. To order the memory we need a part number that begins with MEM. If anyone has a suggestion, please post. -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52632&t=52632 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: VOIP ????? [7:51621]
Vance Krier wrote: > You should also be able to get basic functionality out of the phones by > implementing IP Keyswitch on a router. Check out the following link: > > www.cisco.com/go/keyswitch Thanks for the reference. I'd forgotten all about keyswitch systems. This might be a good way for our VoIP class at the local Cisco Academy to practice with some of the inexpensive VoIP technologies till we can find the funds for the CallManager software. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51730&t=51621 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
AVVID convergence documentation [7:51568]
AVVID specialists: There is an excellent slideshow, "Designing Enterprise Networks for Converged Solutions": http://www.cisco.com/warp/public/779/largeent/avvid/downloads/converge_AVVID.pdf I'd like to know if there is an audio that accompanies the slideshow, or next best, a text documentation with descriptions and explanations that accompany the diagrams. I've downloaded lots of the other documents (including the V and Q books cisco.com/univercd website) but there's nothing that looks like an audio or text supplement to the AVVID convergence slideshow. -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51568&t=51568 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: coursebooks IP Telephony Support Specialist exams [7:51382]
Peter Walker : [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], TISCA wrote: > The IP Quality of Service book is not sufficient > for this exam. DQOS is not just about QOS, but > also about the tools available for deploying it. > Have a good reread of the Blueprint for the exam > (and preferably more than a few days before the > exam - like I did). The information you need to > know is all available on CCO (Tutorials, overviews, > demos of the tools), but you have to do some > searching. Good advice. If you have a list of the URLs, please post. I'll also post in a couple of days (this weekend) after I look aroudn. Regarding the tools, I saw this list on the DQOS Blueprint: * QoS Device Manager * QoS Policy Manager * Cisco Service Assurance Agent * IPM * SMS Are there others you'd recommend? One more question (probably should start a new thread but what the heck): Have you or anyone else "turned the corner" from IP telephony to full-blown multimedia / multiservice or even just to videoconferencing? What does it take to add even just one more service, specifically videoconferencing, to one's bag of skills after learning CIPT, CVOICE and DQOS material? And the big question, Are the tools and application endsystems for video going to be expensive? -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51414&t=51382 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: coursebooks IP Telephony Support Specialist exams [7:51382]
Davis, Scott [ISE/RAC] wrote: > I am doing the same thing for the same reason you are. Thanks for the reality check. I'm going to order the books today. They'll give me and my lab partner something concrete to work with for chapter 11 and 12 of the Bruno book. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51402&t=51382 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
coursebooks IP Telephony Support Specialist exams [7:51382]
I'm preparing for the Cisco IP Telephony Support Specialist exams in parallel with the CCIE written, as there is an overlap of topics such as Diffserv, QoS and multiservice. The three telephony support exams are: * 9E0-402 Cisco IP Telephony (CIPT) Coursebook: Cisco IP Telephony * 9E0-423 Cisco Voice Over Frame Relay, ATM, and IP (CVOICE) Coursebook: Cisco Voice over Frame Relay, ATM, and IP * 9E0-601 Deploying QoS for Enterprise Networks (DQoS) Coursebook: ? The book that looks closest to the DQoS exam is "IP Quality of Service" by Srinivas Vegesna. I'd appreciate if someone who is studying for the DQoS exam or passed it (or the CIPT and CVOICE) would tell me which book they're using to prepare. -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51382&t=51382 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Huawei routers - a.k.a. futurewei.com [7:49778]
Craig Columbus wrote: > Am I the only one who finds it troubling that this company has, apparently, > copied Cisco's proprietary designs and is selling them as their own? Your concerns are reasonable, however, cisco is big, they're majorly profitable, and they have access to the best lawyers money can buy. If futurewei / huawei were ripping them off, we'd hear about it pronto. This should be good news to us, that another company is making products that we can use with only a short learning curve. If the router and switch CLI is similar to IOS, great. Back a few years, when IBM 370 assembly language was king-boss of the hill, companies like NCR (Comten) used a 370-like command set to market their products. Things like this happen all the time. We should celebrate that we're already familiar with the user interface for futurewei. Unless I hear otherwise from the lawyer types, I'm going to pursue any and all products that are cisco-like, inexpensive, etc., in addition to the tried-and-true cisco equipment I already use. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49801&t=49778 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: Anyone tried Huawei Routers ? [7:49670]
Ron Tan wrote: > A piece of Huawei 3640 router just came in the office for evaluation. The > whole box seems like a complete duplicate of Cisco's routers, even the CLI > looks and feels like home. How does the price compare to cisco? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49674&t=49670 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: New CCIE Written is here. He afraid, be very afraid... [7:49595]
Dennis Laganiere wrote: > "To prepare for this exam, candidates may wish to review the exam > blueprint and study suggestions." > http://www.cisco.com/warp/public/625/ccie/ccie_program/whatsnew.html#5 > > If this is anything like the beta, things just got quite a bit harder... In search of someone, anyone who attended the CCIE Power Session in San Diego or Orlando: The URL above (whatsnew.html#5) refers to the beta (351-001): http://www.cisco.com/warp/public/625/ccie/certifications/RoutingBeta.html Will someone who attended the CCIE Power Session (PS-570) at Networkers 2002 in San Diego or Orlando compare and contrast the extensive description of the beta and the Power Session. Please. If someone who actually attended PS-570 would only do this! We're not talking about any NDA violations, nothing to worry about, just free exchange of public knowledge of two public items: * the description of the beta at the URL above * Networkers 2002 PS-570 -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49595&t=49595 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE Written [7:49351]
Wayne Jang wrote: > Is there a new test version? I have study material for the older 350-001. > Is my test material still good or do I need an updated study guide? I don't have the exact answer to this, nor does anyone else that I know of. it appears to be one of those questions we can't answer till the new test is deployed and cisco synchronizes the information on multiple webpages. But I think there's still hope of getting an answer, even at this point in time. There was a CCIE Power Session at the Networkers 2002 in San Diego and Orlando. The URL for that slideshow is: http://www.cisco.com/networkers/nw02/presos/pws/docs/PS-570.pdf There is, or will be, an audio MP3 file that was recorded during the San Diego Power Session (or was it Orlando?). I expect it will be priced around $99 like last year's Power Session. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49413&t=49351 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Networkers 2000 CCIE Power Session Link [7:48857]
Chuck wrote: > for those who missed it before, here is the link to the exact powerpoint > presentation > > http://www.cisco.com/networkers/nw02/presos/pws/docs/PS-570.pdf Do you have the link for order form for the audio MP3 CD? I found an order form for the 2001 recording but not for Networkers 2002. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=49229&t=48857 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM fore CCIE [7:48892]
Phil Lorenz wrote: > I may be missing something, but the link you've included speaks to not > having to configure the ATM "switch." > > From what I read- UNI interfaces will be tested. That's correct: "Candidates will not be required to configure an ATM switch. However, they may be required to connect to a switch that is external to their rack." Source: http://www.cisco.com/warp/public/625/ccie/certifications/ATM_FAQs.html However, ATM LANE is no longer tested in the lab exam. Source: http://www.cisco.com/warp/public/625/ccie/certifications/routing.html -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48983&t=48892 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE preparation and exams [7:48585]
Daniel Lafraia wrote: > If the new beta exam (351-001) will have its number changed > to 350-001 how would you know for sure if you're going to > take the new/old one? I mean. I called Prometric and they > said you're able to register for the 350-001 even after > August 1st (Maybe the registration date?). I missed the beta > by 7% and I'd like to take the old test before it's retired. Daniel, Those of us who are preparing for the R/S exams are in a precarious position, but I think it's going to stabilize in a few months. To me, the big issue is: What are we most likely to be tested on? Officially, for legal purposes, there have been claims that we're responsbible for the entire IOS. However, I've seen statements at cisco.com that certain technologies like IPX and TR are no longer part of the R/S lab exam, and I expect there are some topics that have been excluded from the qualifying exam (for example, we only need to know the ATM UNI on the customer side, not the network side of the UNI or NNI). And then there's the question of what has been added. Later this month I hope to post a summary of my findings (mainly questions and confusions!) and the sources of my information. If anyone wants to send me what they've found, I'll include it in my summary. We're trying to hit a moving target. Everything's in flux. But things will settle down in a few months when all (most?) of the relevant URLs at cisco.com have been updated to reflect cisco's vision of the new CCIE. These are exciting times, sometimes maybe just a little too exciting. -- TT email: [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48824&t=48585 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE preparation and exams [7:48585]
Michael L. Williams wrote: > If you're NOT new to Groupstudy, then feel free take offense at my comment > because you haven't been watching very closely if you're asking about the > new R/S exam this late in the game... =) No offense taken. I'm only here to learn and to better my chances of passing the CCIE exams, not to worry about manners or lack thereof. =) I'm not sure how you'd define "new to Groupstudy", but I can confess to at least one cardinal sin, namely, that I read some but not all of the messages that get posted. In addition, my searching skills are probably not as good as they should be. I searched the Professional / Technical archives on groupstudy.com for "351-001", as that's what my question was about. The result was: Summary for query "351-001": Found 0 matches in 0 files. I didn't do too well on that one, so I went over to cisco.com and searched for the same string. Here's what I got: Results for: 351-001 of about 0. Search took 0.00385 seconds. That leaves me with a question: How do I search not only the subjects but also the body of messages in the Pro/Tech archives on Groupstudy? As a specific test case, how exactly would I find "351-001" in the message bodies? This is a sincere question. If anyone can enlighten me on this issue, I'd be grateful for the help. -- TIA, TT P.S. After posting my original message, I did find the following URL on Google: http://www.cisco.com/warp/public/625/ccie/certifications/RoutingBeta.html For whatever reason, the search on cisco.com finds no matches for "351-001", but references to the URL still exist, thanks to our friends at Google. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48780&t=48585 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: max number of letters? [7:48586]
Michael Williams wrote: > I can't see there would be an RFC on how many letters can be used, > especially since acronyms have been used far longer than the acronym > has been around This may be true. However, one should exercise care in regard to MTU in avian systems. The RFC specifically indicates 256 milligrams. With genetic engineering, that can be expected to increase. Until further research on carrier strength is conducted, the prudent decision is to stay with the shorter acronyms. To be sure, RFC 1149 compliant transport is robust in certain historical contexts. However, weight limitations are not to be taken lightly. -- HTH, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48600&t=48586 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: question to CCIEs [7:48507]
Puckette, Larry (TIFPC) wrote: > It's been some time ago but last time I went to the web and used one of the > comparison calculators for Austin and Dallas I could take a 25% pay cut to > live at same standards in Dallas. Austin is historically an overeducated, > underpaid economy. Austin promotes the hill country to our west to keep real > estate costs high and there are too many colleges and graduating students > that tend to stay in the area driving the wages down. Add to that the fact > that the IT industry is stale here and not many jobs available. Austin sounds a lot like Madison, Wisconsin. We're moving back to that area (WI) in a year or two. Here's hoping it improves. (Anybody there in Madison now? Is there much demand for CCNPs and CCIEs?) -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48595&t=48507 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: max number of letters? [7:48586]
Steven A. Ridder wrote: > Is there an RFC that limits the number of letters you can have in an acronym > or am I just blonde today? > > -- > RFC 1149 Compliant I believe the limit for avian transport systems is three, possibly four, letters, although it is reported that five or even six have been used successfully. Length translates directly to weight, and RFC 1149 compliant carriers are, as you know, weight sensitive in the exteme. Scholium 1: By "letter" I assume you mean a unit of the alphabet, not an envelope for the enclosing or encapsulation of such. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48587&t=48586 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CCIE preparation and exams [7:48585]
A couple questions about CCIE preparation and exams:
* There's a new book from ciscopress, to be published (I hope)
this month: "CCIE Routing and Switching Exam Certification Guide".
It appears to be a preparation not only for the R/S qualifying exam
but also for the C/S. Is anyone familiar with the contents? Does the
book clearly distinguish which chapters / sections are for R/S vs.
C/S?
* Is there a new exam that will replace the R/S qualifying exam
350-001? I heard it might be renumbered 351-001 but there are no
references to 351-001 on cisco.com. Does anyone have information
about this? Specifically, if there is, or will be, a new qualifier,
how will it differ from the current 350-001?
* A ciscopress preparation book for the R/S lab exam, "CCIE Practical
Studies, Volume 1":
http://www.gocertify.com/article/solie.shtml
Anyone have experience with this book? Is it reasonable to focus on
these two books ("Certification Guide" and "Practical Studies Vol.
I") to prepare for the R/S qualifier and lab exams?
-- TIA, TT
Message Posted at:
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Re: Some IETF work of interest [7:48271]
Howard, Do you have URL for a terminology document on IS-IS that is similar to the BGP and OSPF drafts? You also mention that there are methodology and applicability drafts for BGP and OSPF. What about IS-IS? Do you think these would be good background material for the CCIE qualifying exam? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48292&t=48271 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Just passed support, and completed CCNP [7:48035]
Dan Penn wrote: > Well, I just passed support and completed CCNP in one not-so-swift move. > Without breaking the NDA I will say many of the questions were VERY > nondescript as to what they were asking for. I really believe I passed > because I got some lucky guesses on some of the questions. I read MANY > of the questions repeatedly without ever finding out what they meant. Dan, Congrats. I assume you took the new 640-606. I was hoping the rumors about it being better worded than the 640-506 were true, but from what you say it appears that the 640-606 still needs some work. Oh well ... -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48235&t=48035 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Where should i go today :) [7:48173]
Morgan Hansen wrote: > Should I go directly for one of the CCNP exams or would I benefit from > holding on to my CCNA, studying for the CCDA perhaps for the time being? Consider the Vedic principle: "The highest first." As long as Cisco continues to have no prerequisites for the CCIE exams, maybe you should head straingh for the CCIE, especially if you've got access to equipment and everyday experience with the configuring and troubleshooting of routers and switches. Otherwise, start building your CCXX lab in your basement and go for the CCNP, then the CCIE. The CCNP will take time and give you much of the background knowledge and practice you'll need for the final goal. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48214&t=48173 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: new CIT [7:47777]
Historically, T1 and E1 are different from HDSL. However, they now use HDSL in the US to provide 24-channel circuits on a single pair of copper, as compared to the two pairs used for the traditional T1. I wouldn't be surprised if a similar situation occurs with HDSL and E1. Unfortunately, it's been four years since I worked with loop technologies, so I can't guarantee accuracy. Anyone else out there who's currently supporting HDSL? -- TT Mark Odette II wrote: > Ashir, I could be wrong, but I think an E1 circuit and an HDSL circuit > are two different things! [snip] > -Original Message- > From: Ashir73 (CubeXSPlanet.com) [mailto:[EMAIL PROTECTED]] > Sent: Monday, July 01, 2002 2:18 AM > To: Mark Odette II; [EMAIL PROTECTED] > Subject: Re: new CIT [7:4] > > guide me which is the best hdsl modems to carry E1 on a single copper > pair Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47942&t=4 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Took the MPLS exam and flunked [7:47830]
Mike Bernico wrote: > To prepare I used "MPLS and VPN architectures" by Ivan Pepelnjak and also > "Advanced MPLS Design and Implementation" by Vivek Alwayn. The second book > was much more pertinent to the test and I believe is being revised for test, > but check ciscopress.com for that. There's a new edition of the Pepelnjak book advertised on the ciscopress.com website: "MPLS and VPN Architectures, CCIP Edition". How does it differ from the original? I hope I won't have to buy the CCIP Edition, but if it's a significant boost in preparing for the MPLS exam, I'll do it. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47940&t=47830 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: new CIT [7:47777]
Dan Penn wrote: > I'm taking it this Wednesday, but if you check out the exam outlines for > 506 and 606 from CCO they are the EXACT same word for word. I'm taking it Friday or the week after. I hope you'll post a review after you take it Wednesday. The Big Question I have is: Are they testing on routing? We had three in-depth routing chapters (EIGRP, OSPF, BGP) in the troubleshooting part of the Cisco Academy (Semester 8) but there doesn't appear to anything like that in the description of the 640-606 test other than the issues one would be expected with TCP/IP, IPX and AppleTalk. Good luck! -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47788&t=4 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Cisco Lab Changes..Updated [7:46623]
Frank Merrill wrote: > Therefore, effective November 4th, 2002, the following topics will no longer > be tested on the CCIE Routing and Switching exam: > > IGRP > Token Ring > Token Ring Switching > IPX I wonder, will the new 640-60x tests drop IPX? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46625&t=46623 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: InfoWorld article on "Routing SOAP" [7:46601]
Would it be accurate to say that the XML switch is located at the edges of the network, possibly even that it is an endsystem with routing functions? Would there be XML switches in the core network? Where would it be located in the following diagram?: http://vedatel.com/Java/j2ee-web-services.jpg For the benefit of others who may be investigating these web services applications and switches, there is a good background whitepaper at: http://www.theserverside.com/resources/article.jsp?l=J2EE-vs-DOTNET -- TT Moffett, Ryan wrote: > There are a number of vendors creating XML switches, see: > http://www.nwfusion.com/news/2002/132046_04-29-2002.html. > > From my perspective, I think of these Content Aware Switches specializing in > XML. These have some things in common with Cisco Content Service Switches, > but are tailored to XML and have code running at the application level to > even translate XML documents. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46601&t=46601 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
InfoWorld article on "Routing SOAP" [7:46577]
>From the hardcopy issue of InfoWorld (June 10, 2002, Issue 23, p. 43): "Routing, the core technology of the Internet, is emerging as a way to coordinate interaction among SOAP actors on a global scale. SOAP routing is described in two of Microsoft's Global XML Architecture specifications. WS-Routing defines how to specify the route a SOAP messae takes through a chain of intermediaries. WS-Referral empowers those intermediaries to modify the route. These proposals are thus far just trial balloons, but early products such as KnowNow's Event Router ... anticipate a trend toward increasingly active intermediaries." How might this be implemented in Cisco routers and switches? Whether it's Microsoft's .Net or the Java Consortium's J2EE web services, this seems like a new area that may impact how we design and configure networks. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46577&t=46577 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: It's Official - CCNP 6xx series [7:45867]
Creighton Bill-BCREIGH1 wrote: > I sure as hell hope you aren't a teacher, or a CCSI - you need to rethink > your attitude in addressing people, like many of us in this group, that are > here to learn (notice you are subscribed to group"STUDY".com) Amen. It's bad style for teachers or participants to blatantly quash discussion. In a newsgroup/list like groupstudy, it's not only bad style but also devastating to the very existence of the group. We're all here for one reason, and that's to share our knowledge and discuss what's bothering us in the blinding fast technology of routers and switches. I hope to hear from anyone who takes the new 640-60x tests. I'm getting ready to take the troubleshooting cert (640-606) next week or the week after (leaving wiggle room for procrastination, of course). Comments, questions, etc. are welcome. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46030&t=45867 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCNP!! [7:46038]
Chris Dumais wrote: > I completed my 7 month journey today to become a CCNP with the completion of > my CIT Exam. I got a lot of valuable information from this message board. > Thanks for all of your input, it was very appreciated! Congratulations. Which version did you take: the old 640-506 or the new 640-606? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46044&t=46038 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: It's Official - CCNP 6xx series [7:45867]
Kris Keen wrote: > Instead of all crying, just go and sit the exam. Who cares if your > registered for 5x or 6x, you honestly thing they are different? > > The CCNP exams are a joke they are that easy, and if havent changed for 6xx > then I'm really disappointed in Cisco. > > Is BRI and PRI different in how they are composed? No, do you Cisco will ask > you what they are composed of, be it in 5x or 6x ? Yes. Are they different? > No. > > Go and sit the exam. Whoa, Jack, who elected you? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45922&t=45867 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
EIGRP traffic engineering [7:45627]
I've been reading about the extensions to OSPF and IS-IS that enable traffic engineering in MPLS networks. Is there any documentation on the experimental application of EIGRP to TE? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45627&t=45627 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIP - who is doing this one? [7:45453]
Brian Zeitz wrote: > when the CCNP already exists, to make a similar track to it, that is > what doesn't make sense. I don't think the CCIP was necessary; it's only > my humble opinion. What about switching? The knowledge that someone > gained from the CCNA is good enough for CCIP candidates? There are several issues here. First there's the issue of whether the CCIP was needed at all, and second the issue of how Cisco might implement the new CCIP certifications and training courses. My complaint, actually more of a lament, refers to the second question of execution. Regarding the first issue, I think the CCIP is or could be very different from the CCNP. The difference is huge. It's the difference between service provider networks and enterprise networks. The overlap of topics is unfortunate but unavoidable. As core and access networks begin to deploy more MPLS, QoS and PPVPNs, the need for a CCIP will become more obvious. Whether Cisco meets that need in a timely fashion by introducing it into the Cisco Academy curriculum is another question. I can only hope they will, sooner rather than later. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45453&t=45453 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIP - who is doing this one? [7:45443]
"[EMAIL PROTECTED]" wrote: > I am going to get the CCIP, only one test away BSCI and I can't pass it > because I simply don't know IS-IS. I wonder if the new BSCI book by Todd Lammle does a good job on ISIS? How difficult were the other two parts (QoS/multicasting and whatever specialty you chose) in comparison to the CCNP/CCDP certs (BSCN, BCMSN, BCRAN, CIT, CID)? > I am getting it just to get it. I hope one day to get more money from it > but I know this year I won't. Despite my dark predictions about when or if the CCIP will be included in the Cisco Academy curriculum, I'm a huge fan of CCIP and MPLS. According to the large service providers who made presentations at MPLScon in Washington last month, MPLS is already deployed and its use in core networks will continue to grow and accelerate. I think the same holds true for GMPLS in the high-speed optical core. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45443&t=45443 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIP - who is doing this one? [7:45166]
Neal Rauhauser 402-301-9555 wrote: > I'm back to reading groupstudy after an eighteen month abscence. My > CCNP/CCDP certs which I finished 12/2000 and 1/2001 are working wonders > career wise, but I am doing a lot of carrier type stuff now and I've > lined up projects that pretty much cover the BSCI, MCAST+QoS, and MPLS > tests for CCIP - no reason not to get it done if I am going to do the > reading anyway. > > I am curious to know the stats - how many people have completed this > cert? I'm sorry to see there are no responses in this thread. Maybe that's a sign we should give up on CCIP study groups for now and wait till there's more interest in it after, say, 2005 or even 2010. :-( -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=45363&t=45166 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Spanish Inquisition project [7:44906]
s vermill wrote: > Our chief weapon is suprise...surprise and fear...fear and surprise Our > two weapons are fear and surprise...and ruthless efficiency Our *three* > weapons are fear, surprise, and ruthless efficiency...and an almost > fanatical devotion to the Pope Our *four*...no... *Amongst* our > weapons Amongst our weaponry...are such elements as fear, surprise > I'll come in again. > > http://servlet.java.sun.com/javaone/conf/sessions/945/google-sf2001.jsp > > I'm not sure if these slides are any more serious than the skit. Have I been fooled yet again?! I'm checking with our friends at java.sun.com. According to the URL above, the slideshow was used at an actual session, not a BOF. That is an indication, but not necessarily incontrovertible proof, that it's for real. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=44995&t=44906 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Doyle on Lab Rats [7:44611]
Thompson Alton wrote: > Your comments are false and you sound very ignorant. > I work with guys who have 20 years experience and to trouble shoot a problem > take months. This is because they don't know how the protocols work. How > much money can a company afford to lose when production is downloading for a > considerable amount of time? That's why as a mangers? we send Engineers on > training to learn about new and merging technologies. And that?s before you > can put or do any upgrades to the production network you must first try it > out in the lab. An ideal scneario would be to pass the CCNP with production network experience or at least with plenty of lab experience from home/office labs and the Cisco Academies that are popping up all over the country. Moving to the CCIE, the ideal is pretty much production network plus home/office labs. If you're not working with routers and switches that are actually used in a production network, passing the CCIE is not as meaningful as it would be for those who have daily hands-on experience with real design and troubleshooting. I've seen a goodly number of network administrators who are in positions of power, but who don't know even the basics of classful subnetting, VLSM, routing, L2 LAN switching, and VLANs. (Even some telco ATM techs who don't understand the difference between L2/LAN switches vs. VLAN switches, but that's a whole 'nother story in itself). These hands-on guys moved up from the ranks of network operating systems (NOSs), usually Novell, Unix and Windows. I respect their ability to handle a production network but it's a shame they won't listen to the young CCNAs and CCNPs who work for them. They (the old desktop/NOS guys who moved up to network management roles) couldn't even conceive of migrating their RIP networks to OSPF, but with the help of their CCNx/CCDx employees they could really do something good. It's the age-old problem of control and fear of the unknown. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=44947&t=44611 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Spanish Inquisition project [7:44906]
I can't seem to find anything about the Spanish Inquisition project on the cisco.com website. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=44906&t=44906 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Fwd: Let the flamin' begin....dumbass beginner question [7:43762]
Mark,
If I'm reading your situation correctly, I think the problem
comes from the back-to-back FR link. We use 2600 routers in labs
to emulate FR switching between two or more FRAD routers, like
this:
R1/FRADR3/FRswchR2/FRAD
Since your goal is to get R1 and R2 to communicate in a
LAN environment, you can plug them into a hub or switch, using
a /30 subnet for the IP addresses on the interfaces. If you
prefer to use the serial interfaces, use PPP or HDLC.
I realize that you don't trust PPP, but it really is easy to
configure and use. Is there some reason I'm not aware of that
makes you shy away from PPP?
-- TT
Original Message
Subject: Let the flamin' begindumbass beginner question [7:43759]
Date: 9 May 2002 13:18:53 -0400
From: [EMAIL PROTECTED] ("mark")
Organization: GroupStudy.com Discussion Groups
Newsgroups: groupstudy.cisco
I originally configured and maintain several Cisco routers at work so
I'm
not a TOTAL dumbass when it comes to routers but I sure do feel like
one
about now.
I have a couple of 2500's and a 2600 router with a couple of back to
back
cables. I'm not doing something correctly to allow the units to talk
to each
other using those cables. I can telnet into each router or connect via
console connection and all are working. The green lights come on the
serial
connections when the b to b cables are plugged in but I can't for the
life
of me get them to talk to each other. Can't ping from one serial port
on
subnet A thru the b-to-b cable to the serial port on the other router
on the
same subnet on any of the routers. I have checked and rechecked ip
info on
all. I have tried frame-relay and PPP (which I would NOT trust my
configuraion of but I do know frame OK - or at least I thought I did).
I
have RIP and EIGRP enabled on all and have them redistributing. I have
tried
the DCE and the DTE at each end. This is what maybe the particularly
dumbass
question - Do I need to set a clock rate or data rate for a frame
connection
using these cables? If so the commands required would be helpful. I
can look
at the options available. I just need to know where to start with
them. If
it's not a clock rate issue, have I given enough info for anyone to
give me
an educated guess as to what I'm doing wrong? If not, what other info
can I
provide?
Muchas gracias.
Mark "Gump"
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=43762&t=43762
--
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Re: Router/Bridge re-transmit frames? [7:43459]
"Kaminski, Shawn G" wrote: > In your reply below, you're saying that "A half-duplex Ethernet interface > (whether on a bridge, switch, router, server, or PC) monitors for a > collision while sending. If a collision occurs, the interface (I assume > you're talking about the interface on the router/bridge) re-transmits the > frame". So this tells me that a router/bridge Ethernet interface is able to > re-transmit a frame. Correct? Then why do you state in the next paragraph > "The CCIE tests expect you to know that neither a bridge nor router > re-transmits if a frame experiences a bit error or gets lost somehow". Could > you please clarify further? Thank you! I'm sure Priscilla will clarify her comments, but I'd like to say something. You (Shawn) correctly distinguish the two issues that Priscilla introduced: * retransmission of frames that collide * retransmission of frames are corrupted CSMA/CD Ethernet interfaces are built to detect collisions. If there is a collision, the multiple senders back off, hopefully for different time periods, and retransmit the frames that collided. On the other hand, a corrupted frame is a frame that does not collide with another frame but for some reason arrrives at the receiver with one or more bit errors. Bit errors are bits that are inserted, deleted, or toggled (0 to 1, 1 to 0). The cinematic taxonomy here is: * The Good: a frame that does not collide with another frame on the transmission medium and arrives at the receiver exactly as it was sent, with no bit errors. * The Bad: a frame that does not collide with another frame but nevertheless arrives at the receiver with one or more bit errors. * The Ugly: a frame that collides with another frame. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43491&t=43459 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
CIT cert exam vs. Semester 8 final [7:43477]
Has anyone taken both of these troubleshooting exams: the CIT certification exam and the Cisco Academy Semester 8 final? I'd like to know how you compare them in difficulty, scope and any other interesting features. -- Thanks, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43477&t=43477 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: MPLS on existing routers [7:43414]
Sean Knox wrote: > This might help: > > http://www.cisco.com/warp/public/cc/pd/rt/2600/prodlit/1575_pp.htm > > Goes over some MPLS terminology and concepts as well as the product lines > needed to accomplish various roles on the MPLS network (CE, PE, P). Thanks for the reference. Here's what they suggest for PE UNI routers: Cisco 3640 series Cisco 3660 series Cisco 7200 series Cisco 7400 series Cisco 7500 series Cisco 1 series Cisco 12000 series This is for the core P routers: Cisco 7200 series Cisco 7500 series Cisco 8540 series Cisco 8650 series Cisco 8800 series Cisco 1 series Cisco 12000 series I'm wondering, how much these routers cost? If they're expensive, would anyone have scenarios and labs that work with the low-end routers mentioned previously in this thread (2500/2600) and UNI and core routers running the MPLS For Linux software? Or is MPLS going to be one of those technologies like ATM that poor folks like me can't afford? Even if it's possible to build an affordable hybrid lab from Cisco and Linux platforms, we'll still need a scenario builder to develop and market the product. Hint hint. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43444&t=43414 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: network management systems [7:43237]
You mentioned the other area that I neglected to list: the CCIP MPLS certification option. James Leu's MPLS For Linux project would run on the LInux boxes. I don't know what he requires for a kernel. It might not be supported on LRP. -- TT dre wrote: > It sounds like you are going down the right path. > > My suggestion is to get a 5000 or 2900 (orginal, not > XL series) switch (or as many as you can afford). > > Connect at least one 3620 with FE to the switch (again, > whatever you can afford) and use dot1q trunks. Connect > a FreeBSD or Linux box running Zebra and with tagged > VLAN support (dot1q). Now you can have a lot of > interfaces on both sides. You can play around a lot with > that, but for NMS you might have little success since there > are still some problems with subinterfaces and the Cisco MIB's > in some cases. I believe newer code will solve this problem. > In the Linux case, you might even be able to setup MPLS for > learning. It might be a lot more difficult to learn ATM or Frame- > Relay or xDSL or Cable/DOCSIS management techniques without > a lot of specialized (read: expensive) hardware. Then again, if you > really want to learn ATM network management, an LS1010 and/or > 3600 ATM, and/or Cat5k ATM blade aren't going to cost too too much > (if you absolutely must learn ATM specifically, this is probably your best > bet). I'd avoid ATM and other WAN technologies, and concentrate on > LAN network management first, because it costs a lot less. > > In any case, a single router and a single switch allow you to learn > a lot about NMS applications and general configuration ability. > > Have a look at some of these tools (do a search, I don't want to > get all the URL's): > net-snmp, rancid, tool, jffnms, msyslog, nmis, ncat/rat, argus, mrtg, > mhtg, pancho, rtrmon, scli, seafelt, wandoc, rrdtool, etc > > I think ncat/rat, rancid, pancho, mrtg, and net-snmp will interest you > much more than opennms. They will allow you to do all the neat > management features of CiscoWorks but these tools actually work > really well and you can get inside of them and play around with things. > > These books will also help a lot: > http://www.amazon.com/exec/obidos/ASIN/1578701805/qid%3D1020453609/ref%3Dsr% > 5F11%5F0%5F1/103-7458544-1431031 > http://www.amazon.com/exec/obidos/ASIN/0079137822/qid=1020453551/sr=1-3/ref= > sr_1_3/103-7458544-1431031 > http://www.amazon.com/exec/obidos/ASIN/0072122625/qid=1020453523/sr=1-1/ref= > sr_1_1/103-7458544-1431031 > http://www.amazon.com/exec/obidos/ASIN/059600186X/qid=1020453510/sr=1-1/ref= > sr_1_1/103-7458544-1431031 > http://www.amazon.com/exec/obidos/ASIN/0596000200/ref=pd_bndl_img_2/103-7458 > 544-1431031 > > -dre > > ""Tom Scott"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > If you're looking for scenarios that need attention, > > consider network management (Semester 8 of the Cisco > > Academy curriculum, for example). Using just a few cisco > > routers (say, 2-4), one can build and use reasonably > > simple scenarios. But there's a need for more complex > > internetworks in the range of at least 5-10 routers. The > > question then becomes, How to get the routers affordably? > > > * Get an SNMP-based NMS like OpenNMS (opennms.org) or whatever. > > If there's an affordable version of CiscoWorks that's > > available, that would be just great. But I don't think there > > is. > > > > * Learn to use the NMS and MIBs in a complex environment. > > > > Does anyone have experience with this? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43263&t=43237 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
network management systems [7:43237]
Scenario builders (and users), If you're looking for scenarios that need attention, consider network management (Semester 8 of the Cisco Academy curriculum, for example). Using just a few cisco routers (say, 2-4), one can build and use reasonably simple scenarios. But there's a need for more complex internetworks in the range of at least 5-10 routers. The question then becomes, How to get the routers affordably? A previous thread dealt with routing support on Windows. One could also use old hardware (486, for example) to run Linux Router Project from a floppy in addition to a small CCNP lab of 2-3 routers. Does anyone have experience with LRP? Would people who are familiar with cisco IOS have much difficulty configuring LRP? This would be a tres inexpensive solution to building larger labs for learning SNMP network management: * Get a core of 2-3 Cisco routers, and a couple Cisco VLAN switches. * Resurrect some old PCs and put LRP on them. * Configure the LRP routers. * Total number of routers: 5-10 or more depending on how many PCs you can find in your basement. * Get an SNMP-based NMS like OpenNMS (opennms.org) or whatever. If there's an affordable version of CiscoWorks that's available, that would be just great. But I don't think there is. * Learn to use the NMS and MIBs in a complex environment. Does anyone have experience with this? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43237&t=43237 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: application-oriented network design [7:42933]
"Howard C. Berkowitz" wrote: > I've > always found it a graphic challenge that telephony really has two > communications paths: the control/signaling path for call setup and > the like, and the information transfer path. Amen to that. Way back in the dark ages (early 1990's) I did an FSM analysis of ISDN BRI UNI signaling. The first part of the project was to gather and summarize the CCITT and ANSI diagrams ( http://vedatel.com/Isdn/bri-uni-signaling.pdf ). It was a straightforward exercise to diagram the D-channel signaling (control plane). The only way I could get the data plane (B channels) into the picture was to use a 3-D tool, so I took the easy way out. I refer you to the bottom right-hand corner of the diagram where the B channels are indicated. Talk about minimalism! I think there's a reasonable way to approach this AVVID diagramming. I'll post when I've got a better grasp of the situation (need to follow up on suggestions from Larry and Priscilla). BTW I'd like to cast my vote of confidence and appreciation for your postings to this list. I'm unconcerned about what letters you append or prepend to your name. It's knowledge I'm after and I'm grateful to say that you share it in abundance. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43158&t=42933 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CIT exam [7:43100]
Steven Pilkerton wrote:
> I have taken the router, switching and remote access exams, and am about to
> take the support exam. I have heard from some that the CIT exam is the
> easiest and I have heard from others that it is one of the hardest. I
would
> like to get the boards perspective on this. Thanks.
If the CIT certification exam is anything like Semester 8 of the Cisco
Academy program,
it won't be the easiest. The experience of others in my class is the same.
The only course and certification exam that was difficult up to this point
was routing
(BSCN / Semester 5). The reason the CIT material has been difficult is that
it requires
comprehensive knowledge of all three areas (routing, switching, remote
access), and it
adds another dimension, troubleshooting methodology and tools, to the mix.
The tools we
used most often in the troubleshooting labs were native debug and show
diagnostics that
every router and switch has, although there were some exercises with
CiscoWorks,
protocol analysis and network monitoring.
I'm glad I took the course, as I've learned a systematic approach to the
defining of
symptoms and problems, gathering data, laying out the possible causes and
solutions of
the problems, action plans and execution, and documentation of the final
resolution.
Included in the methodology is the isolation of problems, layer by layer,
router by
router, interface by interface, link by link ("divide and conquer"). If
you're good at
native diagnostics (sho and debug), you've got a real advantage. For me it's
a
challenge. I'll be glad when it's over in a couple of weeks.
There's still the question, What is the certification exam like? I hope we
get an
answer. Specifically, I'd like to know how others would compare it to the
routing exam
in difficulty.
-- TT
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Re: application-oriented network design [7:42933]
Priscilla Oppenheimer wrote: > Do you know about the "Cisco IP Telephony Network Design Guide" here: > > http://www.cisco.com/univercd/cc/td/doc/product/voice/ip_tele/network/index.htm Thanks for the reference. Oddly enough, I had it in my bookmarks. For whatever reason it didn't get through my knowledge (read "ignorance") filters. l'll pay attention this time. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42973&t=42933 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
application-oriented network design [7:42933]
I'm reading Priscilla's "Top-Down Network Design". I recommend it as a complement to the Semester 7 BCMSN books. Is there a design strategy or methodology that I can use to diagram application layers into the logical topology? The application I have in mind is AVVID. Suppose the implementation was to take place in two phases: integration of data and IP telephony in phase I, adding video conferencing in phase II. Suppose also that the design included several VG200's and the MCS 7800 (either 7825-800 or 7835-1000), also a switching backbone consisting of 6509 switch with supervisor engine in module 1 and 48-port IP phone blades in modules 2, 3, etc. Phase I would use external 2600 routers; in phase II routing would be moved to the 6509, keeping one or more of the 2600's as backup. Is there a standard technique for incorporating AVVID applications such as this in the logical and/or physical network diagram? I'd especially like to find a template of the logical components and how they interact with each other. That might help explain how to select the hardware and software, and where to locate them in the logical and physical topologies. -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42933&t=42933 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: a good forum [7:42813]
Marko Milivojevic wrote: > Nuclear powers are generally not techincally illiterate. For > example, question "are there any cisco routers in china? what are they used > for?" implies that. You paraphrase my message incorrectly. What I said was this: "tony, just wondering, do you have many cisco routers and switches in China? what models? where are they used? -- This is not a political question, only technical curiosity." I have a dream, and that is to work in China on their networks, preferably with equipment that I'm familiar with such as Cisco and Nortel. I'm fascinated with Chinese culture(s), although I've not had the opportunity to learn more than the basics of the language(s). One guy from China got blasted on the zebra list for asking about terabit routers. I'm glad to see the reception is friendlier here on the cisco list. Cheers, -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42892&t=42813 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: a good forum [7:42813]
gic tony wrote: > i am from beijing in china ,just find this forum ,browse for a while > very good place . tony, just wondering, do you have many cisco routers and switches in China? what models? where are they used? -- This is not a political question, only technical curiosity. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42842&t=42813 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Can't ping [7:42783]
Giles Funnell wrote: > I've just replaced an old 10MB hub with a 2900 Catalyst Switch. All the > connections are fine except for one. I have a relatively blank > configuration with all the computers in one vlan. For this one > connection I can't ping either the PC or the switch from the PC. There > is a connection there and the MAC address of the computer shows up in > the table on the switch so I don't think there's any physical problem > with the connection. I've tried playing around with the speed and > duplex settings but had no luck. I have attached a couple of > configurations from the switch. Did you enable portfast on the access ports? A switch interface is in one of two modes: access or trunk. Since you're not connecting to another switch, it's advisaable to use portfast. You can even enable portfast on an interface that connects to a router if you're not using the router/switch link in a ROAST or OAR configuration (router on a stick / one-armed router). Since the PC MAC addr shows up in the switch table but you're not able to ping the PC, it's likely that the PC doesn't have an IP addr (assuming you're using a DHCP srvr, are you?). Portfast activates the interface quickly so the exchange of messages can occur within the time slice allowed by the DHCP srvr. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42787&t=42783 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Why does IOS only allow ICMP granularity on "destination" [7:42760]
"Howard C. Berkowitz" wrote: > A more useful and lower-level concept idea than that of connections > is state. State is the property that a host, router, etc., remembers > something about a packet, message, physical link, etc., after it has > transmitted the "something." Another perspective on state is finite state machines or abstract state machines. We see FSMs in Cisco's documentation and on some of the CCNP certification exams. Maybe there'll be something about ASMs in the near future. For more on that see: http://www.eecs.umich.edu/gasm -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42760&t=42760 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Why does IOS only allow ICMP granularity on "destination" [7:42753]
"Howard C. Berkowitz" wrote: > Not everything neatly falls into connectionless or > connection-oriented, and, indeed, different functions in ICMP have > different characteristics. It would be an interesting exercise to list the characteristics of connection-oriented connections (did I say that?). I'm looking for the title of the book in which the author defined all communication as connection oriented. He compared it to the empty set being a set. Will post when I find it. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42753&t=42753 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: traffic engineering exercises [7:42504]
Tom Scott wrote: > From the GMPLS/CCAMP TE draft: > >Thus we have a more general notion of a TE link. A TE link is a >"logical" link that has TE properties. The link is logical in a >sense >that it represents a way to group/map the information about certain >physical resources (and their properties) into the information that >is used by Constrained SPF for the purpose of path computation, and >by GMPLS signaling. This grouping/mapping must be done consistently >at both ends of the link. LMP [LMP] could be used to check/verify >this consistency. > > Has anyone written exercises that will work on affordable CCIE/CCNP > labs? In addition to TE, there's also the evolution toward a simplified stack for those who like to stay "close to the wire". An easy-read intro to GMPLS and the simplified stack, "Will GMPLS replace ATM and SONET/SDH in the next few years?": http://198.11.21.25/capstoneTest/Students/Papers/docs/FinalPaper_Proceeding310218.pdf See figure 1 (p. 2): IP ATM IP IP SONET/SDHATM SONET/SDH IP/GMPLS Optical/DWDM Optical/DWDM Optical/DWDM Optical/GMPLS As Cisco was a prime move in the CCAMP/GMPLS WG, I hope we'll see support in IOS and hardware soon, if not already, for labs related to minimal-stack optical transport. I understand that the intended application would be high-bandwidth cores at OC-192, OC-768 and into the terabit range. But it still should be possible to find affordable modules/interfaces that support, say, just a few lambdas, maybe using VCSELs instead of the more expensive lasers? Anybody building those gadgets in your basement? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42537&t=42504 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
traffic engineering exercises [7:42504]
>From the GMPLS/CCAMP TE draft: Thus we have a more general notion of a TE link. A TE link is a "logical" link that has TE properties. The link is logical in a sense that it represents a way to group/map the information about certain physical resources (and their properties) into the information that is used by Constrained SPF for the purpose of path computation, and by GMPLS signaling. This grouping/mapping must be done consistently at both ends of the link. LMP [LMP] could be used to check/verify this consistency. Has anyone written exercises that will work on affordable CCIE/CCNP labs? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42504&t=42504 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: MPLS for the man on the street (without ATM) [7:42214]
"Howard C. Berkowitz" wrote: > >I'm serious. Is there any reason why MPLS cannot be transported directly on > >fiber, > >perhaps even in time slots? Have the GMPLS and IPO WGs addressed this issue? > > > >-- TT > > That's exactly what those two working groups are doing, and other > groups in the IETF sub-IP area are doing for other media such as > cable TV. Complementing this is the IEEE 802.17 (IIRC) work on > resilient packet rings as an alternative to SONET. Thanks for the reference. I subscribed to the 802.17 list. It's always good to know what's happening in the sub-IP areas even if I'm not working with it daily. > >N.B. That's duct tape, not scotch tape. The author knew his stuff, both > >white and > >black. Mr. Waitzman's care in selecting the more robust concatenation method > >is > >appreciated even to this day. > > I always wonder if he had generalized to amphibious avian carriers, > would it instead have been duck tape? IIRC the RFC does not specifically address the application of the avian transport system to aquatic environments. However, one could safely extrapolate to an affirmative answer to your question. I've had lengthy discussions with individuals in the construction trades who claim that the original designation of that type of tape was derived from the sound, which resembles the audible signaling of family Anatidae, produced when the tape is rapidly separated from the storage medium (spooling device). In any case, the RFC illustrates the virtually unlimited adaptability of the Internet and helps us place it in the larger historical context. There is a logical progression of transport technologies from avian to electrical to optical. Furthermore, if it is true that history repeats itself, the RFC has explained not only the past but also the future of telecommunication. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42435&t=42214 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: mpls exam [7:42225]
"[EMAIL PROTECTED]" wrote:
> I passed it. Just read the 2 Cicso books, know ATM well, and use every
> other source you have.
I was hoping to get by with minimal ATM but I gather from what you say that
the
interworking of MPLS and ATM is considered a necessary part of the
ceritification.
According to the exam page, CEF is a topic to be tested. I have the
Pepelnjak/Guichard
book ("MPLS and VPN Architectures") but not the one by Alwayn ("Advanced
MPLS Design
and Implementation"). Pepelnjak and Guichard mention that "the CEF switching
mechanism
is a necessary prerequisite for successful MPLS/VPN data forwarding as label
imposition
is achieved through the CEF switching path" (p. 188). I can only guess the
details.
Were they discussed in the Alwayn book? If not, can you refer me to a
website or other
publication for details about how CEF supports MPLS?
-- TT
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Re: MPLS for the man on the street (without ATM) [7:42214]
"Howard C. Berkowitz" wrote: > >Is there some reason that ATM is necessary for MPLS implementations in low > >end Cisco products? It's been my understanding that VPI/VCI field usage > >for labels in any implementation is generally not used. Every mpls network > >I've worked on used shim headers which makes MPLS l2 agnostic. > > Not as far as I know. Should work even with an extra piece of tape on > an RFC1149 transport. N.B. That's duct tape, not scotch tape. The author knew his stuff, both white and black. Mr. Waitzman's care in selecting the more robust concatenation method is appreciated even to this day. This brings up a related issue. What if someone wanted to transport MPLS packets directly onto fiber, without ATM or SONET/SDH. I realize there will be management issues, but can't the M-plane (not to be confused with avian carriers, mind you) be carried in a separate channel or even on a separate medium? I'm serious. Is there any reason why MPLS cannot be transported directly on fiber, perhaps even in time slots? Have the GMPLS and IPO WGs addressed this issue? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42309&t=42214 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: MPLS for the man on the street (without ATM) [7:42214]
Music to my ears. If anyone has a list of exercises for would-be MPLS addicts, please post the URL. -- TT "Howard C. Berkowitz" wrote: > >Is there some reason that ATM is necessary for MPLS implementations in low > >end Cisco products? It's been my understanding that VPI/VCI field usage > >for labels in any implementation is generally not used. Every mpls network > >I've worked on used shim headers which makes MPLS l2 agnostic. > > Not as far as I know. Should work even with an extra piece of tape on > an RFC1149 transport. > > > > > > >At 05:24 AM 4/22/2002 -0400, Tom Scott wrote: > >>Howard and scenario builders, > >> > >>Do you have any MPLS labs that don't use ATM? Maybe combining low-end > >>(read "affordable") cisco routers and James Leu's "MPLS for LInux" > >>project? > >> > > >-- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42278&t=42214 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: MPLS for the man on the street (without ATM) [7:42214]
RFC 2547 would be nice but not necessary. What I''d like is practice with the paths, basic things like that. Regarding the use of CEF, is that required? I was hoping for low-budget MPLS labs, maybe even down into the 1600 or 1700 Series. If one were willing to give up the efficiency of the CEF switching path, using only process switching, would MPLS still work? If not, I think most of us can get our hands on 2600's. -- TT "Howard C. Berkowitz" wrote: > >Howard and scenario builders, > > > >Do you have any MPLS labs that don't use ATM? Maybe combining low-end > >(read "affordable") cisco routers and James Leu's "MPLS for LInux" > >project? > > > >-- TT > > > > Good idea. I haven't written any yet for our labs, but we > specifically upgraded equipment to do so. The "gotcha" is the router > has to be able to support CEF and some related features, which would > up excluding the 2500 series. We had to change to 2600 and 3600 > series to be able to do it. > > I've got a QoS tutorial due out in May, which will be part of a > series. Probably the first two will be QoS without MPLS and the last > one with MPLS. Not sure yet if I want to do BGP/MPLS/RFC2547 before > MPLS QoS. > > -- > "What Problem are you trying to solve?" > ***send Cisco questions to the list, so all can benefit -- not > directly to me*** > > Howard C. Berkowitz [EMAIL PROTECTED] > Chief Technology Officer, GettLab/Gett Communications http://www.gettlabs.com > Technical Director, CertificationZone.com http://www.certificationzone.com > "retired" Certified Cisco Systems Instructor (CID) #93005 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42221&t=42214 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
MPLS for the man on the street (without ATM) [7:42214]
Howard and scenario builders, Do you have any MPLS labs that don't use ATM? Maybe combining low-end (read "affordable") cisco routers and James Leu's "MPLS for LInux" project? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=42214&t=42214 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: IOS Documentation [7:41577]
Tim Champion wrote: > I have recently been asked to document the various IOS images used within > our network to be used as a baseline. Has anyone had experience in putting > together this kind of document? Good question. I hope someone takes the time to answer. Documentation is one of the most important, and most neglected, aspects of the networking profession. Establishing a baseline is a good start. It includes not only traffic statistics but also configurations, cabling, logical and physical topologies, and anything else that might make the job of maintaining and troubleshooting a network an enjoyable challenge instead of the headache it can be without documentation. I have a potential customer who refuses to acknowledge the need for documentation. He's got an AVVID network that "works just fine without having to hire a consultant to draw a bunch of diagrams" as he puts it. The guy who installed it told him it was zero maintenance, and nothing I've said thus far can convince him otherwise. So I'm preparing a slideshow about network documentation and baselining. I'd appreciate any suggestions, horror stories, success stories, etc. My philosophy is: Plan for failure. I don't mean that in a pessimistic way. It's just that, given enough time, all networks fail in one way or another. Some events are disasters, others only an inconvenience that can be worked around and coped with by non-technical users. But in the long run, something serious will happen, It's our job to be prepared for that and to reduce the negative impact as much as possible. How do we convince clients to invest in baselining, contingency plans and the like? Does anyone have a good book on this? other than the usual ones, like the CIT cert exam preps and Semester 8 from the CNAP curriculum? Is there any specific book or chapter or website that gives a template for baselining, network documentation, contingency planning? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41604&t=41577 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Might be of InCisco GBIC Sourcing & Support Policy [7:41570]
Ismail Al-Shelh wrote: > Its so Obvious that Cisco is trying to be like Microsoft by monopolizing the > market. Business is business. Specifying their own product is standard practice for any vendor. The pragmatic advice is to use Cisco whenever possible (that's a judgment call, the final decision is left to the contractor). But be aware of the consequences, which is what the last few paragraphs of the announcement indicate: --- begin quoted material --- What does Cisco expect from its Authorized Channels? Obviously we believe strongly that our GBIC's are superior in terms of quality and performance to any non-Cisco GBIC. Nevertheless, you may in certain instances prefer to resell third party GBIC's. As stated above, this may occasionally give rise to support and warranty issues, and may cause confusion with the end users. In order to prevent such issues and to protect Cisco's brand and reputation we would like to ask you to observe the following guidelines when reselling non-Cisco GBIC's together with or already installed in any Cisco products you are reselling: Inform the end user of the fact that he is receiving a non-Cisco GBIC; Inform the end user that such a non-Cisco GBIC will not qualify for Cisco support; Inform the end user of the brand of the non-Cisco GBIC and how they can obtain support on those products and what the warranty terms are. Although this statement specifically covers GBIC's, the same issues arise with other third party components e.g. memory or cables. With regard to those products the same principles as set out in this letter apply. --- end quoted material --- You're free to specify non-cisco, but be sure to apprise your client / boss of the risks. Losing TAC support is no small matter. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41570&t=41570 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: 100Mbit cable can't shorter than 6 feets????? [7:41448]
"Ouellette, Tim" wrote:
> I've never heard of anything like that. YOu do have to be carefull with
> fiber though. I've got 10baset cables that are less than a foot and
> 100baset cables that are 10. I think there is a restriction (51.2
bittimes)
> for fast ethernet on the long end but nothing stated as to how short it can
> be.
I use factory-terminated cable assemblies ("jumpers") that are 1' (one foot)
in length.
They come in handy in certain situations where real estate is dear.
Fiber is tricky. Our installer had one heck of a time terminating a short
segment. Less
is not always more when you're dealing with fiber. It depends on the skill
of the
installer and the sensitivity of the installation equipment.
-- TT
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CEF pitfalls [7:41568]
I'm starting to understand CEF. I like what it does. But can anyone refer me to a list of the pitfalls, or features, to beware of? What are the problems with CEF and can I avoid them with workarounds or careful planning and configurations? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41568&t=41568 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Inside Cisco IOS Software Architecture [7:41475]
Internals fans, I'm reading the book, "Inside Cisco IOS Software Architecture" as background for chapter 7 of the Sem8 (troubleshooting) online CNAP curriculum. If you haven't read it, I recommend it for anyone who wants to learn about router components (buffers, memory, processors, switching fabrics, buses). Even for a non-EE like me it's a good read. In chapter 7 the authors explain how the 12000 segments packets into 64-byte cells: 8-byte header, 48-byte payload, 8-byte CRC/trailer. That surprised me, that cell switching is the foundation of a high-end router. Does anyone know if this is common among other vendors? I'd like to browse through some theory books that compare / contrast various switching technologies, to get a better idea of the possibilities for the future. Specifically, a book that discusses fixed-length vs. variable-length swtiching. Does anyone have a bibliography like that? Also, would someone who has a 12000 router please send me the output of the "show controller tofab queue" command. I want to compare it to Example 7-3 (p. 158). I assume that one could use the keyword "frfab" instead of "tofab" to get information on the transmit buffers. If so, could you provide the output of that command too (sho controller frfab queue). Does "carving" refer to the carving / assignment of shared memory? -- TIA, TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41475&t=41475 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: CCIE Written Reading.. [7:41017]
This thread is taking an unhappy turn. We're all friends here and there's plenty of money to be made. Every company has its good side and its bad side. Same for employees. I'm proud to consider myself in the cisco family, meaning, I've taken the 8-semester Cisco Academy courses and I'm just about to take the CIT certification in a coupla weeks. This is the place to be. I even know some employees of Cisco competitors who subscribe to this list. Everybody, give the person next to yoou a hug. :-) Cheers, -- TT "[EMAIL PROTECTED]" wrote: > Quoting Larry Letterman : > > > .. altho we wont do layoffs..we are not > > replacing any body that leaves or does not make it on the performance > > issues... > > Hey Larry, > > Who is "we"? > Are you telling me that you are a mangager or a director at Cisco with the > power to hire and fire? > and even at a managerial position you do not have enough work to do other > than > surf and chat and evaluate Hyper Terminals? > > You must be kidding me, you are not a manger at Cisco, are you? > Or, may be you are. > > A Strobel > > -_-_-_ Mail3000 gives you 30 Megs of Email space free -_-_- > This mail sent through http://mail3000.com/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41423&t=41017 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Collapsed Backbone [7:41418]
Georg Pauwen wrote: > 4A collapsed backbone has high-bandwidth uplinks from all segments and > subnetworks to a single device, such as a Gigabit switch, which serves as a > single point for monitoring and controlling the network4. > > The following link contains a figure detailing the collapsed backbone design > using a Cat4908G-L3: > > http://www.cisco.com/univercd/cc/td/doc/product/lan/c2900xl/29_35wc/sc/swgover.htm Another way to look at collapsed backbones is to consider why it's called "collapsed". Cisco uses a hierarchical campus model that scales down to small one-room networks and up to enterprise-wide networks that include multiple buildings. The full model has three "tiers" or "layers" (access, distribution, core) and multiple types of building blocks (switch block, core block, server block, mainframe block, WAN block). I don't have statistics but I've seen a lot more collapsed networks than networks that fit the full 3-tiered multi-block multi-building campus model. The collapsed model is very popular and can scale up to hundreds of endsystems and dozens of workgroups (VLANs). All you need is a high-end switch, gigabit cabling (preferably fiber but cat 5e/6 works just fine if you keep the cable lengths in the 90m range and if you don't have EMI to worry about), and a high-end router to serve as a firewall and gateway to the outside. Some of the endsystems can be home-run directly back to the main switch, or they can be aggregated at active or passive consolidation points. The router can be a standalone or can be included in the same chassis as the main switch such as a "route service module" or "layer 3 services module". Cheers, -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41422&t=41418 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
equipment book [7:40757]
I just took the BCMSN, and passed. Three down, one to go. I think I must have missed most of the questions about equipment, such as whether to use a 4000, 5000, 6000, 8000, etc. That's definitely the weak link in my knowledge, not only on the BCMSN but also for the BCRAN test. Can anyone refer me to a book where they have good concrete scenarios, comparing and contrasting equipment choices? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=40757&t=40757 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Cisco Network Designer [7:40547]
Chuck wrote: > My employer has had us using the NetformX tool for a couple of years now. > ( this is the software of which apparently Cisco is using a subset for Cisco > products only, according to what I saw on the web page ) I'll take a look at the NetformX. Thanks for the reference. Have you used Netsys Baseliner? It looks like an interesting design tool. I wonder how it would compare to Network Designer and NetformX? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=40755&t=40547 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Pass CCIE,CCNA,CCNP,exams at your first try! [7:40434]
My wife works for one of the companies that the folks at certifysky.com are going to hear from. If I were an owner of certifysky.com, I wouldn't answer the phone. These guys are in serious legal trouble if they're passing out information that is protected by non-disclosure agreements. The only people they're helping is themselves. And that won't be for long. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=40575&t=40434 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Fast EtherChannel [7:40430]
David C Prall wrote:
> The 2900XL does not support PAgP negotiation, so you have to configure the
> channel as on.
Related to this, can you refer me to an example at cisco.com that shows an
FEC between
a 2900 switch and 2600 router ("router-on-a-stick").
Suppose we had two vlans (10 and 20). I think the configuration commands
would be
something like this:
2900
int f0/1
port group 1
switchport mode trunk
switchport trunk encap dot1q
int f0/2
port group 1
switchport mode trunk
switchport trunk encap dot1q
2600
int f0/0
channel-group 1
no shut
int f0/1
channel-group 1
no shut
int port-channel 1
no ip addr
int port-channel 1.1
ip addr 10.1.1.1 255.255.255.0
encap dot1q 1
int port-channel 1.10
ip addr 10.1.10.1 255.255.255.0
encap dot1q 10
int port-channel 1.20
ip addr 10.1.20.1 255.255.255.0
encap dot1q 20
Would that work? (I don't have access to the equipment till next week.)
-- TIA, TT
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=40540&t=40430
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Re: sites for MPLS [7:39950]
good place to start for info on MPLS is the MPLS Forum and MPLS Resource Center: http://www.mplsforum.org/ http://www.mplsrc.com/ -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39952&t=39950 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: MPLS in the Enterprise [7:36670]
Kent, Irwin, This is an interesting exchange of perspectives. Could you or someone else comment on GMPLS? How does it factor into the comparison of MPLS vs. FR? Is there anything about the combination of MPLS / GMPLS that gives it an advantage over FR? Another issue I'd like to understand in this context is native MPLS transport. Do you see a possibility in the future for simplifying the transport of MPLS packets? In other words, could one replace SONET/SDH with a simple transmission layer X (whatever that might be)? The stack ,might look something like this: 7 7 6 6 5 5 4 4 3 3 3 3 2 2 2 2 2 2 1 1 1 X 1 1 1 ^ ^ | | +-+ native MPLS core There in the middle, where the "native MPLS" core would be in a greenfield network, is it possible to transport the MPLS packets on a fiber medium, possibly on different lambdas using GMPLS, but without SONET/SDH? I don't work on that layer (physical L1) enough to know the interactions between L1/L2, but it seems that simplification is desirable. Possibly using MPX (MPLS over PPP over X) instead of traditional POS? There are many reasons to keep SONET/SDH, for example, protection switching. Is it possible that MPLS / GMPLS could offer similar solutions that would have a competitive advantage? Maybe someone at MPLScon will have an answer. See you there. -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39129&t=36670 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Why we need BGP to establish MPLS? [7:39014]
Thinkworker and other MPLS fans, MPLS does not route; it's a switching or forwarding technology. How does MPLS get it's routing information? Usually from a dynamic routing protocol, either BGP for inter-domain routing or an IGP (IS-IS, OSPF, RIP, EIGRP) for intra-AS routing. That's the simple, unhelpful answer to your question. I hope I'll have a better explanation after next week after MPLScon. If you're in the DC area (McLean, VA), you might should go to at least the first day of tutorials (Monday March 25). For the money, you can't beat it: half price if you sign up before the event by web or fax. Two theory / background books on this, in addition to previous threads where we listed the two ciscopress books by Pepelnjak & Guichard, and Alwayn: 1. MPLS: Implementing the Technology, by Eric Gray. 2. MPLS: technology and Applications, by Bruce Davie and Yakov Rekhter. Take a look at pp. 12-13 of the Gray book. Here's the last paragraph of that section to whet your appetite: "Unlike ATM, however, the label-switching approach is generally applicable to a number of network technologies, does not always require fragmentation of data packets into cells, and allows direct use of native routing information and technology. Label switching is the process of making a simplified forwarding decision based on a fixed-length label; this label can be included in a Frame Relay DLCI, an ATM VPI/VPC, or at the head of an MPLS shim header in other tehcnologies." Are you familiar with Cisco multilayer switching? MPLS is similar to the mantra, "Route once, switch many". I'll leave it to others to explain whether that's a good comparison or not, and, I hope, to give a better one. See you all at MPLScon. Maybe we could meet at the message board after the last tutorial session on Monday (5:00 p.m.). "Be there or be square." -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39018&t=39014 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: Stitched up on .NET [7:38919]
As long as you're talking about .Net, you might should have a look at J2EE. Eventually they'll probably interwork but now there seems to be a big difference. I'm working on a report to compare Cisco's e-commerce with J2EE. They're essentially dealing with the same thing, only from different perspectives. I'll post the URL when it's ready (sometime near the end of 2002/Q2). -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38931&t=38919 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: clock rate [7:38908]
[Question] 1. in FR, when we specify clock rate for 64k, we use clock rate 64000, why not 64 x 1024 = 65536 ? and for 1.544 mbps, we use 148000, why not 1.544 x 1024 x 1024 ? Partial answer: Transmission speeds are in bits per second (temporal), storage is in bytes (spatial), although you'll find reference to octets (usually not expressed as bytes) in the speeds when they're discussing frame formats. When you see 1.544 mbps, it's 1.544 x 10^6 = 1.544 x 1000 x 1000. As long as you're measuring speed, you don't make a conversion from a decimal number to a power-of-2 number. The 1.544 mbps came from the original T carrier system, when we had T1, T2 (4 x T1) and T3 (28 x T1) encapsulations (or whatever it was called) and DS0 (64 kbps), DS1 (24 x DS0), DS2 (4 x DS1) and DS3 (28 x DS1) speeds. If I remember correctly, the T carrier system was deployed way back in the 1960's in the US, and in Europe as the E system. The research was probably finished at Bell Labs and the universities in the 1950's; they also had specifications for optical that we are still trying to figure out how to deploy. Those old guys were pretty smart, especially when you consider the state of the art at that time. The DS0 speed came from 8 x 8000 = 8 x 8 kHz. That works out to a speed of 1,536,000 bps when you combine 24 DS0 channels. Adding 8000 bps (8 kbps) for framing gives 1,544,000 bps or 1.544 mbps. To say that DS1 is 24 DS0 channels is slightly misleading unless you realize that the extra 8 kbps framing is implied. You'll have to do some mulitplication to check the DS2 and DS3, and look up some of the old books (this is considered ancient history now). I have no idea what to say about 148x 10^x. Where did you get that? -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38917&t=38908 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ATM for CCIE [7:38772]
The one book I'm reading is from ciscopress: Cisco ATM Solutions, by Galina Pildush The next question is, How does a cash-challenged individual such as myself set up an ATM lab in his basement? Someone mentioned the LS-100 in a previous message. What are the going prices on that? Also, can I find affordable cards for a low-end router (say, a 2500/2600) to turn it into an ATM switch as we can do for a FR switch. The FR switch command is "frame-relay route"; is there something like "atm route" that enables the switching of ATM circuits from one interface (or subinterface) to another? If so, then we could emulate a service-provider cloud, which we then could access across a standard UNI. The bottom line here is the bottom line: Can it be done affordably in our practice labs? -- TT Original Message Subject: RE: ATM for CCIE [7:38772] Date: Tue, 19 Mar 2002 09:25:46 -0500 From: "Matthew Meiers" Reply-To: "Matthew Meiers" To: [EMAIL PROTECTED] Anyone know any good ATM books? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Persio Pucci Sent: Tuesday, March 19, 2002 6:57 AM To: [EMAIL PROTECTED] Subject: ATM for CCIE [7:38772] Folks, I'm reading the CCIE Resource Kit 2001 Ed., and I think that the amount of information about ATM that the book covers is just insufficient for the test. Anybody feels like this? Or is it just enough? Any recommendation for ATM? Regards, Persio Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38801&t=38772 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
where to post CCIP queries [7:38598]
Regarding the above URL, it specifies: "Certifications: Cisco's CCNP & CCDP, and those studying for the CCIE Lab Written Exam." Does that include CCIP even though it's not listed? If not, where should we post the CCIP threads? Cheers, -- TT Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38598&t=38598 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
