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getting the error while taking ssh of the router 1941 - "Network error : connection timed out .."

 

I am getting the error while taking ssh of the router 1941. And i can able to access all other cisco switches routers thru ssh. But only 1941 router, i am facing the issue in daily 4-5 time. after 5-6 hrs it automatically comes up.

changed the cable. Checked the CPU utilization is normal - 5%.

Configured active standby mode and this router is in standby mode. there is less cpu utilization.

 

only SSH connection says "Network error : connection timed out .." The issue occurs at every day and after some time automatically SSH works fine. There is no specific time. It occurs randomly, no fixed time.

T Steps,
Reconfigured the SSH connection with 1024 key.
Verified the ACL rules.

SSH Config ;

ip access-list standard TELNET-ACCESS
permit 172.17.102.0 0.0.0.255
permit 172.17.103.0 0.0.0.255 --------> This Subnet,i couldn't access the SSH some times.
permit 172.21.102.0 0.0.0.255
permit 172.21.103.0 0.0.0.255
!
line con 0
line aux 0
no exec
line 2
no activation-character
no exec
transport preferred none
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
access-class TELNET-ACCESS in
password 7 <removed>
transport input ssh
line vty 5 15
transport input ssh
!

Please advice

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VIP Mentor

Re: getting the error while taking ssh of the router 1941 - "Network error : connection timed out .."

Hello,

 

compare the output of 'sh ip ssh' from the 1941 with another device that is working without any issues. Is the key size the same ?

 

One thing you could try is zeroize the existing rsa key and then reenter it:

 

1941(config)#crypto key zeroize rsa

1941(config)#crypto key generate rsa modulus 1024

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