SSH is disabled randomly

[asarlo]

Hello,

I have a cisco 2612 router, the IOS version is 12.2(11)T.

I has configure ssh, the following is the configuration:

ip ssh time-out 60

ip ssh authentication-retries 2

SSH Enabled - version 1.5

Authentication timeout: 60 secs; Authentication retries: 2

I can connect via ssh a the router with this configuration. The problem is that I can't connect (the application (putty) display a error message) after I connect at several times. This problem is resolved accessing a the router via console and perform the following command (delete the rsa key and generate this key again):

crypto key zeroize rsa

crypto key generate rsa

Thanks in advance.

[gfullage]

Sounds like the session isn't disconnecting properly. Are you just closing the PuTTY window, or are you actually typing "quit" at the router prompt? If you login a second time and do a "sho users", do you still see the old session in there (will probably be on vty 0)? Basically you can only connect 5 times and use up the 5 VTY ports before you won't be able to get in again. If you session is not disconnecting properly then eventually you'll run out of available ports to SSH/telnet into.

I just set up a 2612 with 12.2(11)T and using PuTTY was able to connect and disconnect numerous times. No matter how I disconnected the session would be released from the router almost immediately.

[asarlo]

Generally the connection is lost by time-out. Often I disconnect use exit command. A this moment I can't connect. I access by console, when I enter "sh user" command I not see vty connection.

Some idea?

Thanks.