SSH Connection Problems

Unanswered Question
Mar 16th, 2009

Could use some help here. I have an older version of Cirrus Config Manager that I used to upload config changes. It logs in to systems using SSH. Occasionally after it logs in though, something happens and I can no longer connect using SSH to that device unless I reboot it (telnet still works). Using putty, I get a message saying that the "Server unexpectedly closed network connection". After a reboot, I can get into the router (this seems like it is only happens on routers, and not switches). I know I have read that this happens if you change the hostname of the device, but the host name hasn't changed when this happens. I have tried to delete and regenerate the RSA key, but still no luck.



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glen.grant Mon, 03/16/2009 - 04:14

It can also happen if you have to replace the device and or supervisor as the new key will not match the stored key in the device you are ssh'ing from, I have seen this going from a unix device and you have to clear the key for that device and make a new one . Also make sure you have your exec-timeout parameters set on the vty sessions.


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