nanog mailing list archives
Re: 2511 line break
From: Joe Abley <jabley () isc org>
Date: Tue, 27 Jul 2004 14:38:23 +0545
On 27 Jul 2004, at 10:13, Joe Abley wrote:
On 27 Jul 2004, at 08:10, Ingo Flaschberger wrote:if there is an ssh enabled ios (i presume thats an cisco 2511), then you could do an flash and mem upgrade before login.There are ssh loads for the 2511, because I've downloaded them and loaded them onto 2511s before. There are no ssh loads for the 2511 that allow you to actually use ssh with a non-null cypher without triggering watchdog timers on the router though, last time I checked. The 2511's small brain is easily overwhelmed.
I found a 2511. Turns out that the small brain *is* easily overwhelmed, but not so much that it can't handle single ssh connects, at least to return a prompt to a client. I get these on the console:
31w6d: %SYS-3-CPUHOG: Task ran for 2008 msec (0/0), process = SSH Process, PC = 3814BB4. -Traceback= 31F59FC 3814BBC 3871260 3871DDE 386BDE0 386BC52 386218A 385CF34 385EAB0 385E2F2 3867DE8 3867128 387BC42 3878936 3879E0A 31w6d: %SYS-3-CPUHOG: Task ran for 2008 msec (0/0), process = SSH Process, PC = 3814BB4. -Traceback= 31F59FC 3814BBC 3871260 3871DDE 386BDE0 386BC52 386218A 385CF34 385EAB0 385E2F2 3867DE8 3867128 387BC42 3878936 3879E0A
but the ssh client session does actually complete, and I can type commands. This is on a 2511 which is doing precisely nothing else -- no routing protocols, just a single async port connected to the console on a FreeBSD box.
So, it *is* possible to use ssh to connect to a 2511, at least a 2511 with absolutely nothing else to do. Whether or not this will be useful will depend on how busy your router is.
Joe Cisco Internetwork Operating System SoftwareIOS (tm) 2500 Software (C2500-K4P-L), Version 12.0(25.4)S, EARLY DEPLOYMENT MAINTENANCE INTERIM SOFTWARE
TAC Support: http://www.cisco.com/tac Copyright (c) 1986-2003 by cisco Systems, Inc. Compiled Mon 30-Jun-03 19:57 by nmasa Image text-base: 0x0304D258, data-base: 0x00001000 ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWAREBOOTLDR: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)
xxxxxxx uptime is 31 weeks, 6 days, 23 hours, 7 minutes System returned to ROM by reload System image file is "flash:/c2500-k4p-l.120-25.4.S"cisco 2500 (68030) processor (revision D) with 16384K/2048K bytes of memory.
Processor board ID 03004308, with hardware revision 00000000 X.25 software, Version 3.0.0. 2 Ethernet/IEEE 802.3 interface(s) 2 Serial network interface(s) 32K bytes of non-volatile configuration memory. 16384K bytes of processor board System flash (Read ONLY) Configuration register is 0x2102
Current thread:
- Re: 2511 line break, (continued)
- Re: 2511 line break Randy Bush (Jul 26)
- Re: 2511 line break Laurence F. Sheldon, Jr. (Jul 26)
- RE: 2511 line break Michel Py (Jul 26)
- Re: 2511 line break Dickson, Brian (Jul 26)
- RE: 2511 line break Michel Py (Jul 26)
- Re: 2511 line break Robert Bonomi (Jul 26)
- Re: 2511 line break Ingo Flaschberger (Jul 26)
- Re: 2511 line break Joe Abley (Jul 26)
- Re: 2511 line break Randy Bush (Jul 26)
- Re: 2511 line break Ricardo "Rick" Gonzalez (Jul 26)
- Re: 2511 line break Joe Abley (Jul 27)
- Re: 2511 line break Randy Bush (Jul 27)
- Re: 2511 line break Ingo Flaschberger (Jul 26)
- Re: 2511 line break Steven M. Bellovin (Jul 27)
- Re: 2511 line break Petri Helenius (Jul 27)
- Re: 2511 line break Valdis . Kletnieks (Jul 27)
- Re: 2511 line break Petri Helenius (Jul 27)
- Re: 2511 line break Randy Bush (Jul 27)
- Re: 2511 line break Niels Bakker (Jul 27)
- Re: 2511 line break Richard Welty (Jul 27)
- Re: 2511 line break Stephen J. Wilcox (Jul 27)
- Re: 2511 line break Jeff Shultz (Jul 27)