Re: Router gets stuck
It is reading the config file after loading the IOS. When it gets to the con line 0 configuration, something is wrong. Break the router on boot, and from rommon mode, check out the startup config, and remove any configuration you have under "line con 0" -Erik [EMAIL PROTECTED] - Original Message - From: "Barbara Cobbina" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, December 01, 2000 6:15 AM Subject: Router gets stuck | Well, After fiddling around with hperterminal and the | cables it now works. | However the router stops after going through the | post. | The last message I get is | | %LINK-5-CHANGED: Interface serial1 administratively | down. | | I know this error mesage is informational and nothing | needs to be done., however it gets stuck here and I | cannot type in anything after this . | | Any ideas, anyone ? | | Babs | | | | __ | Do You Yahoo!? | Yahoo! Shopping - Thousands of Stores. Millions of Products. | http://shopping.yahoo.com/ | | _ | FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html | Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] | _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Lab router management
Set up a terminal server with console connections to all the routers. You will need to power clear the routers to begin the process. the best setup would be by using remote power switches. Write a script that sends a break to the terminal servers. Then sends commands for setting the required configs, setting aliases and then do a tftpdnld ( in case they changed the IOS.) -Erik [EMAIL PROTECTED] - Original Message - From: "Ben Hockenhull" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, December 01, 2000 2:10 PM Subject: Lab router management | A student of mine just came into my office and posed this problem to me: | | Given a set of lab routers, where a student is allowed to do anything they | wish to the router, how can things be set up so that the router is | automatically restored to a known default configuration at the end of the | student's session? | | My initial response is that there's really no good way to do this, short | of special boot roms that would somehow intelligently tftpboot. | | boot net statements won't work, as the student can remove them. | config register frobbing won't work, as the student can change the config | register, and, indeed, might have to do so to practice password recovery. | | Given that the student can change config registers, write erase, set | enable passwords, reload, etc, how do labs manage their routers in these | situations? He seemed to think that Cisco Academy has some kind of | software that helps them with this problem, but I don't see how it's | possible. | | Seems to me that all you can really do is have a staff of people to set | things right all the time. | | Anyone have any ideas? | | Ben | | -- | Ben Hockenhull | [EMAIL PROTECTED] | | _ | FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html | Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] | _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: EASY ?? FOR MOST OF YOU
I have a question regarding CSMA/CD vs full duplex. If the problems relating to distance are set due to the limitations of CSMA/CD, what are the limits when using full duplex? I have had several situations where I had to run fiber because of distance, but these where almost invariably full duplex uplinks or trunks. Can I go farther with copper if the link is full-duplex? -Erik -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Priscilla Oppenheimer Sent: Monday, January 22, 2001 7:16 PM To: Brian Lodwick; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: EASY ?? FOR MOST OF YOU At 09:20 PM 1/22/01, Brian Lodwick wrote: >B for > > >>>Brian >My additional question on top of this one is: > >If the maximum legal length was set to 1/10th the size to make regular >(10Mb/sec) increased by a factor of 10, what was done to further increase >100Mb/sec Ethernet by a factor of 10 to get Gigabit Ethernet? I like your plan to turn this into a non-easy question! The only experience I have with Gigabit Ethernet is in a fully-switched network where every port is full duplex, in which case CSMA/CD parameters are not an issue. However, shared, half-duplex Gigabit Ethernet is viable also. With shared 10 and 100-Mbps Ethernet, the minimum frame size is equal to the maximum round-trip propagation delay of the network. In other words, the minimum frame size is equal to the slotTime = 512 bits. Sticking to this rule would haver resulted in impracticably small networks for Gigabit Ethernet, however. The solution was a process called "carrier extension." According to Rich Seifert in his excellent book, "Gigabit Ethernet," "The key change is that the slotTime and the minimum frame are no longer the same. The minimum frame is maintained at 512 bits (64 bytes, as in 10 Mbps and 100 Mbps Ethernets), but the slotTime is set at 4096 bit-times (512 bytes). Frames that are shorter than the slotTime are artificially extended by appending a carrier-extension field so that they are exactly one slotTime long. This extends the duration of the time that the station transmits If a collision occurs during any time from the beginning of the frame to the end of the extension field, the MAC will jam, abort, and backoff." See the book for even more gory details! &;-) Priscilla > >>>Brian > > >attenuation is effected by 3 elements spreading, scattering, and absorption. > > >From: Alvarado Jesus <[EMAIL PROTECTED]> > >Reply-To: Alvarado Jesus <[EMAIL PROTECTED]> > >To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]> > >Subject: EASY ?? FOR MOST OF YOU > >Date: Mon, 22 Jan 2001 14:10:43 -0500 > > > >The network span of a 100Base-T Network (205) meters is approx. 10 times > >smaller than the network span of a 10Base-T network (2500) meters Because > > > > > >A) , Higher speed data signals attenuate more quickly and so cannot be > >transmitted that far > > > > > >B) . Both Networks have minimum frame sizes of 64 bytes and the network > >spans must be tied directly to the minimum frame transmission time to avoid > >collisions. > > > >_ > >FAQ, list archives, and subscription info: > >http://www.groupstudy.com/list/cisco.html > >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > >_ >Get your FREE download of MSN Explorer at http://explorer.msn.com > >_ >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Priscilla Oppenheimer http://www.priscilla.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Linux kernel ported to work on Cisco hardware
Although it conflicts with the original goal of Linux as a *NIX for cheap hardware, the use of Linux on Cisco hardware will benefit those who have simple routing tasks to do and do not need a bloated -whoops, feature rich OS for the job. good WAN cards for x86 boxes can be expensive and troublesome, this could solve some real world problems with custom network systems and applications that need direct access to network hardware, and the Cisco hardware with Linux will also be great for development of new protocols. Erik Mintz mail.com - Original Message - From: "Richard A. Holland" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, September 12, 2000 11:51 PM Subject: Linux kernel ported to work on Cisco hardware | I just came across this link: | | http://freshmeat.net/projects/uclinux-cisco/ | | kind of scary, but interesting. Wouldn't catch me ditching the IOS for | linux though. | | | Richard A. Holland | Voice/Data Integrator | Telec, Inc. | http://www.telecinc.com | | CCDA,CCNP,MCSE,CSE **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: isdn backup
What are you trying to backup here? I don't see any routing. Start with a working primary first and I can probably give you suggestions for a solution. Roughly, what you need are two static routes with different weights so the primary is favored, and the backup is much more costlier, or, set the dialer as the default route with a static 0.0.0.0 pointing to the primary, that way, when the primary disappears, the static leaves the table and the dialer goes up. remember to write an access list on the dialer to prevent dialing for RIP updates, etc. depending on what type of traffic you have traversing the router. -Erik - Original Message - From: "Clue Less" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, September 21, 2000 10:25 AM Subject: isdn backup | Greetings all, | | Got a question on routing with ISDN backup. Could | someone shed some light on how to properly implement | the backup command with routing? | | I'm using the backup command, and ip unnumber for both | primary and backup interfaces. | | int loop 0 R3 int s0/0-primary--int s2 R5 | int loop 0 (5.0.0.5) | int di1---backup---int di1 | | Below is config. | | What static route can I use to complete the routing to | the remote end? Because unnumbered addresses is use, | I'm unsure what the static route should look like. | The only thing I can think of is using floating | static, but that sort of defeat the purpose of the | backup command. | | | ClueLess | | ! | hostname r3 | ! | interface Loopback0 | ip address 3.0.0.3 255.255.255.0 | no ip directed-broadcast | ! | interface Serial0/0 | backup interface Dialer1 | ip unnumbered Loopback0 | no ip directed-broadcast | clockrate 64000 | ! | interface BRI0/0 | no ip address | no ip directed-broadcast | encapsulation ppp | dialer pool-member 3 | isdn switch-type basic-ts013 | isdn answer1 :3 | ppp authentication chap | ! | interface Dialer1 | ip unnumbered Loopback0 | no ip directed-broadcast | encapsulation ppp | dialer remote-name r5 | dialer string :5 | dialer pool 3 | dialer-group 1 | ppp authentication chap | ! | dialer-list 1 protocol ip permit | | r3#sh ip route | Codes: C - connected, S - static, I - IGRP, R - RIP, M | - mobile, B - BGP |D - EIGRP, EX - EIGRP external, O - OSPF, IA - | OSPF inter area |N1 - OSPF NSSA external type 1, N2 - OSPF NSSA | external type 2 |E1 - OSPF external type 1, E2 - OSPF external | type 2, E - EGP |i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS | level-2, * - candidate default |U - per-user static route, o - ODR | | Gateway of last resort is not set | | 3.0.0.0/24 is subnetted, 1 subnets | C 3.0.0.0 is directly connected, Loopback0 | r3# | **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Ether Channel is it an issue???
enable portfast on every host/server. -Erik - Original Message - From: "Sandeep Kulkarni" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, October 02, 2000 12:13 PM Subject: Ether Channel is it an issue??? | Hi All, | Slightly off topic, But i just want to share someone's | view on this one. | We are in the process of migrating our infrastructure | to the Cisco switches. We have a pure NT netowrk with | Once PDC & One BDC. I mooved all the users to the new | switch with no issues at all. Then started mooving all | the NT member Servers, This also went very smmothly. | However when i mooved my BDC i am having a nightmare, | I am getting all kind's of authentication problem like | login script hangs, Or people not able to see the | domain controller (Tcpip connectivity is fine) This | has started happening only after we mooved the BDC to | the new switch. I have Ether Channel on the Servers | with the Intel cards. Tcpip connectivity looks fine. | This started happening only after i mooved the DC to | the new Cisco 6509 switch. I don't know weather it's a | coincidence or a problem. Also i have checked the | Domain controllers for their sync. issues there are | none. | I was just wondering if anyone has land up in the same | mess as i am & have any resolution to this one. Any | help is greatly appriciated | | thank you in advance | | Sandeep | | __ | Do You Yahoo!? | Yahoo! Photos - 35mm Quality Prints, Now Get 15 Free! | http://photos.yahoo.com/ | | **NOTE: New CCNA/CCDA List has been formed. For more information go to | http://www.groupstudy.com/list/Associates.html | _ | UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html | FAQ, list archives, and subscription info: http://www.groupstudy.com | Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] | **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Terminal server not able to Reverse Telnet
You're not logging out of the first connection, therefore, the terminal line is in use when you try to log in again. Use the command "sh user" to show current line connections. You will see a user on the async line, use the command "clear line " to reset the connection. Erik Mintz Domestic Field Engineering Manager Mail.com [EMAIL PROTECTED] - Original Message - From: "Manishkumar Patel" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, November 03, 2000 5:15 PM Subject: Terminal server not able to Reverse Telnet | Dear All, | Hi! | I have setup 2511 as Terminal Server, with the Octal RJ-45 cables connected to | Console port of 4 2500 Routers. During a day the reverse Telnet works fine, | but when I try to Telnet on next day morning, it says " CONNECTION REFUSED", | What can be the Problem & solution? | | It works fine after Rebooting the Terminal Server. | Your help will be appreciated. | Thanks in advance...Have a nice weekend. | Regards | MK | Andre Fecteau <[EMAIL PROTECTED]> wrote: | | > - | > Attachment: | > MIME Type: multipart/alternative | > - | > I configured some routers for ISDN, but one of the spids is coming up | > invalid can anyone tell me why? I put the BRI configurations for both | > sides as well as the error message that I'm getting. Can someone help | > me fix this problem? By the way I called the service provider and they | > said everything is OK regarding the ISDN lines and spids. I can telnet | > and other things, but I just can't get both channels to come up at the | > same time. And obviously at least from my limited knowledge base the | > invalid spid has something to do with that! I've been pulling my hair | > out over this one for a few days! I'd like a solution, but all | > suggestions are more than welcome!!! | > | > Both side have this: | > isdn switch-type basic-ni | > isdn voice-call-failure 0 | > isdn tei-negotiation first-call | > | > One side | > interface BRI1/1 | > ip address x.x.x.x x.x.x.x | > ip nat inside | > encapsulation ppp | > dialer map ip y.y.y.y name y broadcast yyy(first #) | > dialer map ip y.y.y.y name y broadcast yyy(second #) | > dialer load-threshold 10 either | > dialer-group 1 | > isdn switch-type basic-ni | > isdn spid1 xx xxx | > isdn spid2 xx xxx | > ppp authentication chap | > ppp multilink | > ! | > | > Other side: | > ! | > interface BRI1/0 | > ip address y.y.y.y y.y.y.y | > encapsulation ppp | > dialer map ip x.x.x.x name x broadcast xxx(first #) | > dialer map ip x.x.x.x name x broadcast xxx(second #) | > dialer load-threshold 1 outbound | > dialer-group 1 | > isdn switch-type basic-ni | > isdn spid1 yy yyy | > isdn spid2 yy yyy | > ppp authentication chap | > ppp multilink | > ! | > | > This is the ISDN status : The other side is the same except both spids | > are valid! | > Global ISDN Switchtype = basic-ni | > ISDN BRI1/0 interface | > dsl 8, interface ISDN Switchtype = basic-ni | > Layer 1 Status: | > ACTIVE | > Layer 2 Status: | > TEI = 73, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED | > TEI = 74, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED | > TEI 73, ces = 1, state = 5(init) | > spid1 configured, spid1 NOT sent, spid1 valid | > Endpoint ID Info: epsf = 0, usid = 40, tid = 1 | > TEI 74, ces = 2, state = 4(await init) | > spid2 configured, spid2 sent, spid2 NOT valid | > Layer 3 Status: | > 0 Active Layer 3 Call(s) | > Activated dsl 8 CCBs = 0 | > The Free Channel Mask: 0x8003 | > | > Help! | > Andre | > | > | > -- | > Andre Fecteau | > Unix Software Engineer | > [EMAIL PROTECTED] | > CNE3, 4 & CCNA | > | | | | Get free email and a permanent address at http://www.netaddress.com/?N=1 | | _ | FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html | Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] | _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Should I save my old router?
I have a question to the CCIE lab veterans regarding this question; Do the proctors throw in systems with older IOS's on them in the lab to cause problems that are solved by newer IOS versions? And if so, do they smile or frown upon upgrading to solve the problem, or expect you to find a different workaround? Erik Mintz Mail.com [EMAIL PROTECTED] - Original Message - From: "Dennis Laganiere" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, November 10, 2000 9:57 PM Subject: Should I save my old router? | I'm putting together my little home CCIE lab and amoung the 2500's and | 3600's on my desk is a little, lonely 1005. It's cute, it works fine as a | 1-Ethernet, 1-Serial box, but the IOS is version 10.3(7) and it only has 8k | NVRAM and 4mb flash. | | The questions are: | | Should I try and upgrade the IOS (and/or memory), or does it actually help | me to have another version of IOS available to play with? | | and | | Should I just retire this little buddy and pick up another 2501? | | Let me know your thoughts... |- Dennis | | _ | FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html | Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] | _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: About accessing to some sites
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 If you can trace and ping the sites, it sounds like your address blocks may be filtered at the destination or more likely, your L4 switches. First try telnetting to port 80 from both sides of the switches, if you suspect it is they're side, run a ping against the sites checking port 80 and varying your source addresses. Also, first try pinging from the troublesome source IP's with large packets, it could be a misconfigured circuit dropping your HTTP requests but passing the tiny ping packets, I've seen this before on x.25 links and could happen at any layer 2-3 device. Erik Mintz Director, IT operations Crosslinks systems 1 Silicon alley plaza New York, NY 10038 [EMAIL PROTECTED] - -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Á¶ ±¤ ¼® Sent: Friday, July 14, 2000 5:16 AM To: [EMAIL PROTECTED] Subject: About accessing to some sites This is kornet in korea. The kornet is one of ISPs in our nation. Recently we have had difficulty in getting to some sites like www.chez.com,www.com,www.yahoo.co.uk www.blizard.com,www.polarismech.com. Mostly we have got lots of calls from the customers who use ADSL connection with source ip address 211.38.0.0. they say they can traceroute and ping to the destinations but can't open the sites on the web. With the ip space 168.126.0.0 that we currently use, we also can reach to the sites but we can't open the two sites www.chez.com,www.com on the web. For your reference, our customers go through L4 switches and Net caches. we need your help!! if you need further more question, feel free to ask us !!! from cho ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: PGP 6.5 iQA/AwUBOW81/JYKdIYZnR1XEQLSXgCcCRq/4qAZrhLGYGU88QNsYcNgxqkAoMSj Ir0ASyJBxbpTgoI7Xnizjula =/znK -END PGP SIGNATURE- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Altiga/VPN guru's
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 What problems are you having in detail? What you are probably running into is conflicts with the NAT implementations the providers are using, causing the TCP header checksums to fail with AH auth. Try a combination of L2TP with IPSec, you can get alot of info on IPSec from the cisco website, and of course from the RFC's and drafts, I would would start with talking to cisco, Altiga says they're "IPSec" compliant, but the options and complexity of IPSec makes that somewhat grey at this time. Erik Mintz Director, IT operations Crosslinks systems 1 Silicon alley plaza New York, NY 10038 [EMAIL PROTECTED] - -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chris H Sent: Monday, July 17, 2000 9:11 AM To: [EMAIL PROTECTED] Subject: Altiga/VPN guru's Group, There has to be someone out there having the same problems with the Altiga client that I have seen. I have found that the Altiga client only works with a limited number of ISP's such as Mindspring, Earthlink, etc. However, any obscure or off the beaten path type of connection, the client will time out. My questions: 1. Is there a work around, or a newer release of the client revision that corrects these problems? 2. What other clients (using IPSec) has anyone tested with the Altiga VPN concentrator? Your comments are appreciated, thanks in advance. Chris Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: PGP 6.5 iQA/AwUBOXMwG5YKdIYZnR1XEQK21QCeJNVkw0ymnK9kYQE4R9doX6RZIwUAoJah triWv3FZY2xYnGshH6TdHIAI =Z7wH -END PGP SIGNATURE- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: BGP multihoming question
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 A 2500 won't hold enough RAM, The minimun I would use is a 3640 w/ 128M, cisco has been suggesting the 7140 for small, simple setups, and the pricing is pretty good. If you are on a real tight budget, do it with a server running Linux and GateD, or Solaris/GateD, you can build a PC based server to handle a relatively large amount of traffic and and your peering for less than 4 grand. - -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mehmet Ilgaz Sent: Monday, July 17, 2000 12:18 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: BGP multihoming question As a costumer, I want to have two internet connection to 2 different ISP. I must have an AS number and a registered IP block . Is it true? What is the minimum router konfiguration for this situation?Can Cisco 2500 support this? ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: PGP 6.5 iQA/AwUBOXM9ApYKdIYZnR1XEQLVLgCeKHyJtxDxQx53f6FczrevF3h4jfcAnijf K09rJ9knFXQQaawI2goE4H9B =DB0q -END PGP SIGNATURE- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Cisco Prerequisites
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I wouldn't waste my time with mastering windows if you have no interest in it, or anything else you're not interested in, for that matter. Myself, I don't do windows, My opinion of microsoft products is that they are the worst consumer products of the modern age. You are a step ahead of other newbies with your love for the command line, most people would rather point and click. Learn the fundamentals of networking, if possible, take cisco's ICRC class, great course. Use you Linux box to provide various network services and solve problems, build as many as you can to represent a complex network. Keep up with mailing lists like this and hit the newsgroups for more, make friends by helping others solve they're networking problems. Before you know it you'll be working with experienced people and finding more opportunities. I know many top level network engineers who couldn't find the start menu on a windows box, so the answer is no, you don't need micro$oft experience to to succeed. There is enough work out there right now so you can tell a potential employer "no thanks" if they demand you to have NT experience for whatever reason. Of course, it doesn't hurt to know your way around an operating system that is found almost everywhere, just don't cry when you find yourself staring at blue screens and up all night tracking down bug-fixes to cryptic error messages that reference code that is locked up tight in the Washington woods -here's one that was sent to me in an FYI from my NT admin last week before he had to patch a server; A fatal MTA database server error was encountered. A bad list member length is on object 0646. File offset: 3134. Attribute ID: 79. Referenced object (0 => N/A). Referenced object error: 0. [DB Server DISP:ROUTER 8 42] (16) What the hell does that mean? Erik Mintz Director, IT operations Crosslinks systems 1 Silicon alley plaza New York, NY 10038 [EMAIL PROTECTED] :-) "They have computers, and they may have other weapons of mass destruction." - -Janet Reno, US Attorney General, 2/27/98 #-Original Message- #From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of #Okuwa, Daley #Sent: Thursday, August 03, 2000 6:19 AM #To: 'Adedapo Ola' #Cc: '[EMAIL PROTECTED]' #Subject: RE: Cisco Prerequisites # # #Not neccesarily but it gives you a better edge if you have been in LAN #enviroment and probably MCSE # # #Daley Okuwa #EDS Network services #Stockley Park #Tel no 0208 -5353144 #fax no 0208-7544057 -BEGIN PGP SIGNATURE- Version: PGP 6.5 iQA/AwUBOYrSrpYKdIYZnR1XEQIVIQCgnJtjpEsL5Q/EvF0DxIdqnVySR6sAoNc6 hAYnXdmbZAIK5AsCUKciv/Of =YoYe -END PGP SIGNATURE- ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Standard Cisco passwords
>From the default password database, maintained by Eric Knight. see -http://www.securityparadigm.com/defaultpw.htm Cisco,IOS,,Multi,enable,cisco,,"IOS technically has no ""default pw'" Cisco,IOS,2600 series,Multi,n/a,c,,but these are common misconfigurations Cisco,IOS,,Multi,n/a,cc,, Cisco,IOS,,Multi,n/a,cisco,, Cisco,IOS,,Multi,n/a,Cisco router,, Cisco,CiscoWorks 2000,,,guest,(none),User, Cisco,CiscoWorks 2000,,,admin,cisco,Admin, Looking at the full list will give you an appreciation of cisco's design, as the database is filled with default passwords for other vendors. Erik Mintz Mail.com - Original Message - From: "Hans Stout" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 29, 2000 6:30 AM Subject: Standard Cisco passwords > Hi colleagues, > > do you know what the Cisco standard passwords are ? As far as I remember, > they are 'cisco' and 'sanfran', but I am not sure (also not sure about > lower/upper case). > Thanks for your help in advance. > > Georg Pauwen > ___ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: dns
There are several options for the goal you are seeking. The question is how much money you have. The best solution of course would be to distribute the site over geographically distant locations, multi-homed at each site peering (BGP) with multiple providers. Also, don't forget farms of redundant servers/switches/routers at each site with load balancers. I suggest starting your high redundancy plan with a single good data center with redundant connections to an ISP with a very high SLA and a redundant backbone that is peered to multiple providers. Go redundant on switches and routers to your server farm, and add a pair of load balancers. You can also add DNS load balancers, cisco calls theirs "distributed director". I personally don't believe in relying on DNS for disaster recovery, unless I have a data center explode, I can bring everything back up long before the DNS updates propagate everywhere. Erik Mintz Mail.com [EMAIL PROTECTED] - Original Message - From: Nurarif Wibawa To: [EMAIL PROTECTED] Sent: Wednesday, September 06, 2000 4:37 AM Subject: dns Hi, I need a solution for the configuration below: Internet | | | | ISP A ISP B | | | | Customer | Web Server Web Server will has 2 IP addresses, one will be given by ISP A and the other one will be given by ISP B. Primary DNS server is on ISP A and secondary DNS server is on ISP B. The DNS server on ISP A has two records for customer's web server, for example : www a 10.0.0.1 (IP address given by ISP A) www a 20.0.0.1 (IP address given by ISP B) The goal is to use dual ISP for back-up purpose, so the web server will serve for 24 hour / day. Since the DNS server only load balance between two same host records, how about if one link is broken ? For example : Link from ISP B to Customer is broken, meanwhile someone in Internet is accessing the web server and the DNS server give him the IP address of 20.0.0.1, so the session will time out. He will has an access to web server until the DNS server give him the IP address of 10.0.0.1 (because the DNS server load balance these two records). Are there any solutions to solve this problem, so the DNS server could detect the unreachable IP address and after that it would give the correct reachable IP address to the client ? Thank you
Telephony switches
Hello All, can I get some suggestions on good books and/or resources to help me get familiarized with telephony switching, in particular, the Cisco/summafour telephony switches? I found cisco's online docs for the VCO/4k, but I am light in experience with telephony switching and need some more fundamental info. Thanks, Erik Mintz Domestic field engineering manager Mail.com [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Router Configuration Backups?? [7:70009]
Use a TFTP server with tripwire installed. All you need is an old PC, a basic linux install and a free version of tripwire. Cost is next to nothing. Erik Mintz -- >From: "Stevo" >To: [EMAIL PROTECTED] >Subject: Router Configuration Backups?? [7:70009] >Date: Mon, Jun 2, 2003, 12:37 PM > > Hey Group, > > I have a number of routers that don't get their configs backed up on a > regular basis... does anyone have (or know of) any software products out > there that will do the backups for me... or even better still, let me know > if a config is changed by someone?? > > Thanks > > --Stevo Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=70106&t=70009 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: FR concept question [7:71263]
The short answer is no.
Server1 requests a file from Server2.
At router Chicago, a frame is created with a remote destination DLCI 100.
Encapsulated in that frame is the packet with a destination of Server 1.FR
is a layer two protocol. It only has info to forward the packet to the
remote switch with DLCI 100. This is defined by the PVC mapping.
Yes, shorter path would be to use the frame cloud to send it to DLCI 99
directly. However, DLCI 86 and DLCI 99 are DTE devices that are not aware of
each other.
If the frame was addressed to DLCI 99 directly, it would be dropped by the
carrier as a violation of the defined map. Since there are only ten bits
available for addressing, DLCI numbers are reused for different customers.
Chicago Miami
[Server2] [Server 1]
/\ /\
DLCI 99 DLCI 86
| --|
||
DLCI 100 DLCI 200
|/\-{HUB SITE}-/\|
Erik Mintz
--
>From: "Aaron Ajello"
>To: [EMAIL PROTECTED]
>Subject: FR concept question [7:71263]
>Date: Tue, Jun 24, 2003, 1:05 PM
>
> This is probably a very simple concept question, but I've asked a couple
> people and haven't gotten a solid answer.
>
> If I've got two frame relay spoke sites connected point to point with a hub
> site and a server in one spoke site copies a file to a server in the other
> spoke site, does all the traffic pass through the hub site, or is it
> switched within the frame cloud?
>
> I guess what I'm wondering is does a frame cloud act somewhat like a lan,
> where initially packets will go through the default gateway and be routed
> and then the following packets will be switched?
>
> thanks.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=71293&t=71263
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