SSH

glen.grant · ‎03-23-2009

We seem to have a real issue SSH'ing from one cisco device to another , it becomes real slow and even put in like characters that were not typed. We did not have this problem when we were using telnet only. Any seen this or have any ideas on what might cause this. It's a couple of 2800's and maybe 3-4 3560's and 3750's . We can get in its just real slow and we get some strange characters...

bauti1428 · ‎03-23-2009

What IOS version are you using? Did you try using a diffrent IOS to test?

glen.grant · ‎03-23-2009

I am seeing thrashing messages in the 3560's for the SSH process so maybe this is a software issue , they are running 12.2.46SE crypto .

Mar 22 00:03:17 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/10, changed state to up

.Mar 22 02:51:38 UTC: %SCHED-3-THRASHING: Process thrashing on watched message event. -Process= "SSH Process", ipl= 6, pid= 250

-Traceback= D245A4 D24CF0 15540C8 1554450 17D61C8 17D6C54 17D76B0 17D81E8 17D82BC 1A475C 1A49C0 1A50FC 1A4FA8 CDBECC 17DB5D8 17DBEC4

Mar 23 12:55:38 UTC: %SCHED-3-THRASHING: Process thrashing on watched message event. -Process= "SSH Process", ipl= 6, pid= 181

-Traceback= D245A4 D24CF0 15540C8 1554450 17D61C8 17D6C54 17D76B0 17D81E8 17D82BC 1A475C 1A49C0 19EE2C 19F7D0 19FD20 19D20C 19FDDC

Mar 23 14:23:37 UTC: %SCHED-3-THRASHING: Process thrashing on watched message event. -Process= "SSH Process", ipl= 6, pid= 181

-Traceback= D245A4 D24CF0 15540C8 1554450 17D61C8 17D6C54 17D76B0 17D81E8 17D82BC 1A475C 1A49C0 1A50FC 1A4FA8 CDBECC 17DB5D8 17DBEC4

Mar 23 14:25:04 UTC: %CLEAR-5-COUNTERS: Clear counter on all interfaces by rochteam on vty0 (10.192.64.2)

Mar 23 14:25:33 UTC: %SCHED-3-THRASHING: Process thrashing on watched message event. -Process= "SSH Process", ipl= 6, pid= 181

-Traceback= D245A4 D24CF0 15540C8 1554450 17D61C8 17D6C54 17D76B0 17D81E8 17D82BC 1A475C 1A49C0 1A50FC 1A4FA8 CDBECC 17DB5D8 17DBEC4

Edison Ortiz · ‎03-23-2009

Glen,

Try changing to SSHv2.

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsu51740

__

Edison.

bauti1428 · ‎03-23-2009

Edison is right with the fix it is a bug on 12.2(46)SE with V1. Try using V2 or an IOS before that version.

glen.grant · ‎03-23-2009

Yup thats us to a tee . Question do all we have to is add the -v parameter when SSHing? Do you "have" to specify which ssh version in the config of the switch or router or can I just use the -v parameter when going from 1 cisco device to another .

bauti1428 · ‎03-23-2009

You can also run

ip ssh version 2

also

do a show ssh

it will show you if you are connected version 1 or 2.

Edison Ortiz · ‎03-23-2009

Question do all we have to is add the -v parameter when SSHing?

When acting as SSH Client, you need to -v option:

http://www.cisco.com/en/US/docs/ios/security/command/reference/sec_s6.html#wp1031557

When acting as SSH server, you just need ip ssh version 2 command.

HTH,

__

Edison.

dario.didio · ‎03-23-2009

Hi,

I have faced the same issue.

When being connected to a device via console, making an SSH connection from that device to another.

It's realy slow.

When connected via telnet,SSH to a device, and making a new SSH conenction from there to another device, we didn't have this problem.

I think it was on a C4500 with 12.2(46)SE IOS.

Haven't found a solution for this problem. I assume it has something to do with the serial connection.