Enc name is NULL: client 3des-cbc server aes128-ctr,aes192-ctr,aes256-ctr

[pa454k003]

Hi Guys,

I am not able to SSH from my CRS router with code 5.3 to ASR9k router with code 6.2.3. I can telnet but can not SSH. I get below error on both routers' log.

%SECURITY-SSHD-6-INFO_GENERAL : Enc name is NULL: client 3des-cbc server aes128-ctr,aes192-ctr,aes256-ctr

Did anyone come across this problem?

Thanks

[tkarnani]

Please see

https://community.cisco.com/t5/service-providers-blogs/ios-xr-sshv2-ctr-ciphers-support/ba-p/3104510

Essentially you will need to upgrade your ssh client or enable the support of these ciphers