After an NX-OS upgrade on my 3548, it couldn't be discovered by my config backup program. As it turns out, Cisco isn't presenting a valid SSH negotiation. I don't notice anything via PuTTY, but upon starting the process, the switch responds with:
dcos_sshd run in non-FIPS mode
SSH-2.0-OpenSSH_6.2 FIPS
The second line should be all that is on the first line the switch responds with. Has anyone else seen this?
system: version 6.0(2)A6(3)