2511 line break

Tue Jul 27 08:53:23 UTC 2004

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 Software
IOS (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 SOFTWARE
BOOTLDR: 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