Crashing SSH session when doing nested SSH from one device to another

[Racso]

Hey forums, so I have a situation

I used to be able to SSH connect from my Catalyst to my Nexus, doing like a nested SSH situation

After I updated the Nexus to the version 8.4.2, when I attempt to access the Nexus, it closes my Catalyst SSH session

I am sure that the Nexus SSH is working since I can use a local desktop to access it, but it seems so weird that when trying to connect to another device it closes my SSH session on the original Catalyst

Is there any insight that could help me address this issue?Switching, LAN Switching, Other Switches

[balaji.bandi]

Check on nexus what you see logs when it fails ? or crash ?

[Racso]

nothing on the nexus, and its like a ssh close session instead of crash

not sure why when i logging into the nexus, it closes the session on the catalyst

[balaji.bandi]

i was thinking may be ssl handshake issue, since you mentioned after upgrade it was happending.

[Racso]

and do you think the ssl handshake is able to close the catalyst session?

how can I check that?

[balaji.bandi]

Never Tried that option -  jump from one session to another not the best practice to do and security concerns.

enable-debug and see.

terminal monitor

debug ip ssh

[Racso]

not working

can't seem to find the debug option for ssh

[balaji.bandi]

which switch? nexus switch side or cat switch side, what is the error you getting when you try to enable debug?

catalyst ssh debug :

https://www.cisco.com/c/en/us/support/docs/security-vpn/secure-shell-ssh/13881-ssh-cat-switches.html

Nexus side debug :

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/troubleshooting/guide/b_Cisco_Nexus_9000_Series_NX-OS_Troubleshooting_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_Troubleshooting_Guide_7x_chapter_010001.html