Bill,
A link that is trunking does not belong to any VLAN. However, if trunking
goes down, then the ports at either end of the link revert to their
"native" VLAN. If no VLAN has been assigned to those ports, then they
default to VLAN 1. VLAN 1 is the VLAN that carries CDP, STP, VTP, and other
c
Indeed.
I believe the form you're looking for is CF4457 "Certificate of
Registration for Personal Effects Taken Abroad".
Instructions are at http://www.customs.gov/travel/4457.htm
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Gee. Last I checked, John Galt was a ficticious person in Ayn Rand's "Atlas
Shrugged". Very popular with Libertarians.
http://globalfreedom.com/jg_index.html
Karen E Young
ELF Technologies, Inc
[EMAIL PROTECTED]
Benny,
Try thinking of trunking as a "service" that runs on the access links,
multiplexing traffic from multiple vlans. Those links have a native VLAN
that they revert to if trunking breaks down. For example, if you reboot a
switch and it's unable to negotiate the trunking due to a mismatch in t
Think about it for a second. Both sides have to speak the same language.
That means speed, duplex, encapsulation, and trunking mode. While you may
be able to fudge the trunking mode bit of things, the rest of it you can't.
If the speed and duplex are set to auto there's a good chance that it'll
p
RADIUS:
RFC 2138, 2139 - (uses port 1812)
TACACS+:
RFC 1492 - (uses port 49)
Karen E Young
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 206-770-4035
Pager: 206-994-4514
There are a few chapters on ATM (and LANE & MPOA) in LAN Switching by
Kennedy Clark.
ISBN 1578700949
Alternatively...
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Internetworking:ATM:LANE
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Internetworking:ATM:ATM_General
http://w
Sorry, should have specified.
Both RADIUS and TACACS+ use UDP.
If you stop to think about it, the needs of authentication are better
served by a connectionless protocol. The client sends a request and the
server sends a response. Much like DNS, DHCP, and PAP or CHAP. In alot of
cases, you can d
Brian,
ITO looks like it has the same info as ITH. You can see this especially
clearly by taking a look at these two URLs.
http://www.cisco.com/cpress/cc/td/cpress/fund/ith2nd/it2403.htm
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/introwan.htm
The first is from the sample chapters f
12.1? I don't think so. While 12.1 does support it, its hardly the
"minimum".
I've seen Vines configuration info for system software version 8.3 and
Vines is certainly available in IOS 10.2 and later. The configuration
guides are usually located in the "Network Protocols Configuration Guide,
Par
Dean,
Whether or not you use the VLAN id as the group ID is up to you. On my
network I have one VLAN running over one HSRP group and three others
running over another just to balance out the load on 2 T1s.
-Original Message-
From: [EMAIL PROTECTED]
Sent: Tuesday, October 10
copy run tftp may be faster, but there are times when you may want to use
SNMP instead. For example, when you have a large number of devices and you
want to track changes to the configs. Use SNMP to back up the config if it
detects a change. You can then script things to compare the previous conf
Chen,
You don't want to enable portfast on ANY port that hooks up to a multiport
device. Switch, router, hub, even a multi-homed server. Only enable it on a
device that has a SINGLE connection to the network. Even at that it would
be a good idea to set up the portfast guard stuff unless you can
The link should be
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 425-369-5369
Fax: 425-391-1774
Pager: 206-994-4514
it depends
Catalyst OS - "set logging session disable"
Cisco IOS - "no logging monitor"
HTH
Karen E Young
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 206-770-4035
Pager: 206-994-4514
There is a presentation from Networkers that covers this (as well as the
problems with IPSec and HSRP), complete with sample configs.
http://www.cisco.com/networkers/nw00/pres/2402.pdf (Advanced IPSec
Deployment Scenarios)
HTH
Karen E Young
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 206-
I've run into this one personally. Not only can't you get an IP address,
but on a faster machine, you can start domain login before you actually
have network connectivity too.
If you add things like trunking and PAgP to the mix, the delay is even
longer. Thats why I turn off EtherChannel and Tru
I beg to differ on this one. I'm currently dealing with a network that has
4 VLANs. Two of those VLANs use multiple subnets. the only thing you need
to do to make another subnet work on a VLAN is a secondary IP on the router
interface for that VLAN. Remember - VLANs are layer 2 (MAC address), not
I have a situation where I have all traffic going through a firewall and
one of the VLANs shouldn't talk to the other VLANs. I just put a router
between the switches and the firewall and null routed traffic from the
restricted VLAN to any of the other VLANs.
Karen E Young
Network Engineer
ELF Te
According the RFC 2281 its "Hot Standby Router Protocol".
HTH
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
"A Brandon"
The big reason that the switch needs to be able to _support_ 64 VLANs is
VTP.
If you have a number of 1912's acting as VTP clients to, say, a Cat 4006
with 35 VLANs configured then the client switches need to be able to
support information for at least 35 VLANs. This is irrespective of whether
t
Since we seen to be doing the Spanning Tree simulations today... Imagine
what happens when you have two instances of STP running, one per VLAN on
VLAN 100 and VLAN 200, and then hook both VLAN 100 and VLAN 200 to the same
hub. :-)
Have fun!
Karen E Young
Network Engineer
ELF Technologies, Inc
Oh it was! :-)
One of the R&D people wanted to be able to access his test server from his
desktop machine. When we told him "No!" he decided to get creative. Our boy
decided to do this while I was out of town at the Las Vegas Networkers.
They had the network crashing 3-4 times/day the entire tim
Actually, it shows up more than once. In the sample output from the "show
isdn status" listed just above the table, sapi and tei are listed under
layer 2. :-)
TEI and SAPI are part of the address field of an LAPD frame - which is
Layer 2.
If you want further info about them, check out this:
htt
It seems to me that unless he's already taken the CIT exam, he'll have to
study it anyway. Besides, learning is a _good_ thing. It increases your
worth to current/prospective employers. :-)
Karen E Young
NEtwork Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
They _are_ all protocols.
ATM = Mostly Physical & Data Link but shows up in Network (encapsulation,
signalling, transmission, etc)
Token-Ring = LAN Physical & Data Link layer protocol (wiring, tokens)
FDDI = Physical & Data LInk layer protocol (wiring, frame control & route
information)
Eth
Greetings!
I was wondering if anyone knew the specifics on just how much of an effect
that PAgP, VTP, and DTP would have on convergence times. I had this info
once upon a time but someone lost the document and we can't determine when,
who, or where it might have strayed to. I looked on CCO but th
Karen Young writes:
>
EMAIL PROTECTED]] On
Behalf Of
Mooney Drew-DMOONEY1
Sent: Friday, July 28, 2000 3:18 PM
To:[EMAIL PROTECTED]
Subject:RE: a ccna question-help
Karen Young writes:
>Of course, you could look at it this way... If it has an RFC then chances
>are its a protocol.
&g
Okay... Since this isn't answering my question. Let me rephrase...
How much time does PAgP take to do it's negotiation on a given port? DTP?
Assume that the port is set to either desirable or auto in both cases.
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
This has a good explanation.
http://www.ssh.fi/tech/crypto/algorithms.html
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Fomes Ia
Elmer,
Spanning tree uses the _lowest_ value, not the highest. By raising the
value, you're guaranteeing that traffic will go opposite of what you want.
Also, you need to lower the bridge priority, not the port priority or port
cost..
The default value is 32K (32768). Just change this to 16K or
It does NOT rain all the time. Its just propaganda to keep people from
moving here from California. :-)
Seriously, it does tend to be gray skyed more than is really necessary but
you can count on only having a couple days of snow a year (slushy snow at
that). When it does rain it tends to be fai
Try these spots...
Pine Mountain Group
http://www.pmg.com/ or http://www.networktraining.com/ or
http://www.netanalyst.com/
CCTI Security Training
http://www.ccti.com/courses/courses.asp?division=14&courses=0&cities=&month
=-1
Radcom Academy
http://www.radcom-inc.com/acad/seminar.htm
Karen E
You can run MRTG on Win NT too.. Here's a URL with some useful info for it.
http://www.wtcs.org/snmp4tpc/mrtg.htm
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Check out WebBoy from NDG Software.
http://www.ndgsoftware.com/
(From their web page)
"WebBoy is a complete Internet/Intranet monitoring package. It provides statistics on
standard Web
tr
Haven't taken the exam but there's an outline for the MCNS course on the
Cisco site.
http://www.cisco.com/pcgi-bin/front.x/wwtraining/course_description.pl?Course=TRN-MCNS&Version=2.0&From=Network_Management
watch the word wrap
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PR
I wouldn't call it load-balancing so much as it's load-sharing. On routers
where you have multiple interfaces for VLANs configured, you can make one
router the primary for certain interfaces/VLANs and the second router the
primary for the rest.
Here's a sample config showing what I mean.
Router
Or you could substitute "public" for "customer" in the URL and get to it
anyway.
http://www.cisco.com/warp/public/105/default.html
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Also, some mail programs will wrap the line by inserting an EOL. When you
copy the URL to the browser you either lose the end of the line (anything
after the EOL doesn't get copied to the clipboard for some reason) or you
end up with a control character in the URL - thereby messing up your
browse
Or perhaps a Sysco proprietary routing protocol such as plastic wrap. :-)
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
"Chuck
Question 1, 2, & 4:
Explanation of address resolution regarding MAC addresses.
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/introint.htm#xtocid193923
Question 3:
Router packet handling
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/routing.htm#xtocid249344
Karen E Young
Ne
Michael,
You can lock up just that one box. I did a very quick search and came up
with this one. I'm sure that there are more out there. You can top it off
with a nice label that says "Property of . Tampering
will be considered cause for prosecution."
http://www.hubbell-premise.com/SearchResult
Ask and ye shall receive
http://www.3com.com/products/nics/3c980cfb.html
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
ARTO.O
http://www.cisco.com/warp/public/474/
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
"David
Can't answer that one for sure, but here's my take on it...
It's true only in that Cisco has designed the various switch lines to
fulfill certain roles in the overall network infrastructure. The Catalyst
4000, 5000, and 6000 series (set based) are what Cisco suggests for the
distribution layer (
The AXIS produxt was renamed to the MGX 8220.
http://www.cisco.com/warp/public/74/121.html
Karen E Young
NEtwork Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Nadeem,
You complain that the Cisco blueprint "covers everything and that is too
much". I have one question regarding this... Just why do you think that
CCIEs are so highly regarded?
This is not to say that you aren't intelligent or knowledgeable. It sounds
more like you are frustrated more th
Actually, The "frame-relay traffic-rate" command DOES exist. It is used as
a simpler alternative to using the three commands for setting up traffic
shaping on Frame Relay ("frame-relay cir out", "frame-relay be out", and
"frame-relay bc out").
http://www.cisco.com/univercd/cc/td/doc/product/softw
The 2924XL uses the IOS based software. How you reset it depends on whether
its a client or a VTP server.
If its a server, you go into VLAN configuration mode ("vlan database"
command), set the VTP domain ("vtp domain "), and then set it as the
server ("vtp server"). If you've configured a doma
Brandon,
With most of them you use the "clear" command.
Ex. "set vtp pruneligible " to set the configuration for
puning eligibility and "clear vtp pruneligible" to remove it.
However, with some of the configuration you just use the regular "set"
command to give it a null value. This retur
Nortel Documentation Library (has links to tech bulletins & manuals at the
top)
http://www12.nortelnetworks.com/cgi-bin/cnss/library/liLibrary.jsp
Bay Networks Guidse to Networking Terms (online)
http://www25.nortelnetworks.com/library/tpubs/terms/
Nortel Certification Framework
http://www.nor
That URL should be http://www.cisco.com/networkers/nw00/pres/pdf2000.htm
instead.
You might also want to check these out.
http://www.cisco.com/warp/public/779/smbiz/netsolutions/find/wan/iptele.html
http://www.cisco.com/univercd/cc/td/doc/product/voice/ip_tele/
http://www.cisco.com/warp/public/
Think for a minute. How does fiber transmit data? Using light. So when the
provider is selling "dark fiber" it means that it's fiber without the light
source to transmit the data. You provide your own. Generally get it at a
discount but in practice it ends up costing about the same since the cost
The CSX image is strictly for the Cat 6000 series from when it was newly
released. It was just to identify the fact that it had seperate features
that the regular CatOS didn't have yet. You can check the release notes for
the assorted CatOS version to identify the particulars. The two versions
sh
These are all Layer 2 protocols. This site has some very good explanations
of the differences.
http://www.sangoma.com/tutorial.htm
LLC2 = IEEE 802.2 Logical Link Control Type 2. Used by SNA and NetBIOS on a
LAN.
Frame Format: http://www.protocols.com/pbook/lan.htm#LLC
LAPD = Access p
ifTable = 1.3.6.1.2.1.2.2
Contains a number of OIDs you want to look at)
ifNumber = 1.3.6.1.2.1.2.1
The number of interfaces/ports on the device - careful with this one, it
includes the virtual interfaces as well as the physical ones
Under ifTable (part of the standard RFC 1213 MIB - you probab
The "recommended" version of the software should be whatever meets you
needs best. You have to take into account memory requirements, what you
want it to do, bugs, and security holes. Its not as easy as saying "this is
what you need" without bothering to check what your needs are. The one size
fi
This has a good explanation of what NetBIOS is good for (and I use the term
loosly):
http://www.cisco.com/univercd/cc/td/doc/cisintwk/idg4/nd2004.htm#xtocid263537
but here is the specific sentance that tells it all... "NetBIOS stations
issue broadcasts for several reasons: to verify at startup
If nobody has the CIT 4.0 objectives, the CIT 3.0 ones are still available
at
http://www.cisco.com/warp/public/10/wwtraining/certprog/testing/pdf/cit3.0.pdf
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 425-369-5369
Fax: 425-391-1774
Pager: 206-994-4514
However, with a zero CIR you also have to keep in mind that alot of
carriers calculate the subscription load on their switch by the aggregate
CIR of all of the customers on the switch. If they have alot of customers
with a zero CIR on a given switch, then it is more likely to become
over-subscrib
Try layer 1. Hubs and repeateras are purely physical. They don't process
data in any way, shape, or form. All they do is move bits from one port to
another. They are focused on BITS, not packets, segments, or frames. Check
your OSI layer functions.
Bridges and switches are layer 2
Routers and ML
Technically, its not a routing protocol, its an enhancement to CDP.
Here:s a whiute paper on designing networks using ODR that might help you
out.
http://www.ieng.com/warp/public/105/39.html
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Hans,
I haven't had the chance to work with ATM but according to the Link 0
Framer info you're getting LOF on the receive (loss of frame delineation).
Combine that with the number of uncorrectable errors on your receive and
I'd say that the problem isn't necessarily your router. You might want t
Good question since the info I have shows the value to be 08-00 and is only
1 byte
Maybe we should ask Howard to verify since he evidently has the IEEE
Standards doc.
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
You're right. I wasn't paying attention. Took a closer look at the format
on my source and saw it was mislabeled.
Here goes with the corrected info:
2 octet TPID with a value of 08-00.
2 octet TCI (Tag Control Information) consiting of
3 bits = user priority
1 bit = CFI (Canonical For
http://www.cisco.com/univercd/cc/td/doc/product/lan/28201900/1928v8x/eecli8x/clipart1.htm#14309
the "ip mgmt-vlan " command
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
802.1q works just fine with FastEther. Just keep in mind that some software
versions or supervisor engines (switches) can support EITHER ISL or dot1q
but not both. The Catalyst 4003's are a good example (dot1q only).
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk: 4
Currently you can't use /31 networks. However, there is an RFC that
proposes changes that would allow their use on point-to-point links only.
RFC 3021 Using 31-Bit Prefixes on IPv4 Point-to-Point Links. A. Retana,
R. White, V. Fuller, D. McPherson. December 2000. (Format: TXT=19771
bytes) (Sta
Just ran across this and figured that I would pass it on.
Cisco IP Multicast Groups External Homepage
ftp://ftpeng.cisco.com/ipmulticast.html
This is not the actual Cisco Technology page on IP Multicast, it seems to
be a page meant for the development teams as an external gateway for IETF
wor
This may help you out...
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
It gives you links to listings of which MIBs are supported on a device
sorted by the IOS version that they are supported under.
HTH,
Karen
>> Original Message Hi,
> I want to integ
Mark,
I don't know about audio materials for certification stuff, but there's a
site that'll let you order the audio presentations from Networkers 1999,
2000, and 2001.
http://recording.safeshopper.com/
HTH,
Karen
>> Original Message Last week someone gave a link to
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