Log - Router Cisco 2811 - SSH2 0: Unexpected mesg type received

[Manoel Goncalves]

Hello, 

I have a Cisco 2811 router generating SSH logs.

Could help me solve this problem?

044076: Apr 29 22:27:10.209 GMT-3: SSH2 0: Unexpected mesg type received
044077: Apr 29 22:45:28.432 GMT-3: SSH2 0: Unexpected message received
044078: Apr 29 23:58:17.907 GMT-3: SSH2 0: Unexpected message received
044079: Apr 30 02:43:06.155 GMT-3: SSH2 0: Unexpected message received
044080: Apr 30 03:38:17.769 GMT-3: SSH2 0: Unexpected mesg type received
044081: Apr 30 06:26:07.213 GMT-3: SSH2 0: Unexpected message received
044082: Apr 30 06:44:18.284 GMT-3: SSH2 0: Unexpected message received
044083: Apr 30 08:33:36.284 GMT-3: SSH2 0: Unexpected mesg type received
044084: Apr 30 15:02:20.357 GMT-3: SSH2 0: Unexpected message received
044085: Apr 30 15:07:18.308 GMT-3: SSH2 0: Unexpected mesg type received
044086: Apr 30 15:23:15.550 GMT-3: SSH2 0: Unexpected message received
044087: Apr 30 15:45:51.501 GMT-3: SSH2 0: Unexpected mesg type received
044088: Apr 30 20:15:54.225 GMT-3: SSH2 0: Unexpected message received
044089: Apr 30 20:59:07.800 GMT-3: SSH2 0: Unexpected mesg type received
044090: May 1 12:56:55.136 GMT-3: SSH2 0: Unexpected mesg type received
044091: May 1 16:27:43.256 GMT-3: SSH2 0: Unexpected mesg type received
044092: May 1 20:13:34.710 GMT-3: SSH2 0: Unexpected message received
044093: May 1 21:44:22.430 GMT-3: SSH2 0: Unexpected mesg type received
044094: May 2 06:01:02.915 GMT-3: SSH2 0: Unexpected mesg type received
044095: May 2 11:50:36.422 GMT-3: SSH2 0: Unexpected mesg type received
044096: May 2 20:36:36.194 GMT-3: SSH2 0: Unexpected mesg type received
044097: May 3 01:56:30.035 GMT-3: SSH2 0: Unexpected mesg type received

[premkumarjm]

Hi,

Cisco recommends to increase the key length while you generate the rsa keys for ssh to resolve the error above.

BR

Prem

[Manoel Goncalves]

Premkumar,
How do I check the current key size? Do you know the command?

Thank you

[premkumarjm]

There is no such command for displaying the key length. The Cryto key generate rsa command is not saved in the router configuration. however, the RSA keys are saved in the private configuration in NVRAM (which is never displayed to the user or backed up to another device) the next time the configuration is written to NVRAM.

[Manoel Goncalves]

Thank you