Recently we've been experiencing a rather irritating issue with SSH on our Nexus 7Ks. This occurred back when we were running 6.0(2). Now we are running this version:
Software
BIOS: version 3.22.0
kickstart: version 6.1(3)
system: version 6.1(3)
BIOS compile time: 02/20/10
kickstart image file is: bootflash:///n7000-s1-kickstart.6.1.3.bin
kickstart compile time: 12/25/2020 12:00:00 [02/22/2013 23:54:07]
system image file is: bootflash:///n7000-s1-dk9.6.1.3.bin
system compile time: 2/15/2013 14:00:00 [02/23/2013 01:08:44]
and we continue to have the problem. The issue is that ssh server stops accepting connections. The workaround is to console into the device and "no feature ssh" followed by "feature ssh" to recycle the ssh server. This started happening around about the same time we added the devices to Cisco Prime Infrastructure. At about the same time we turned on a security auditing product called nCircle which does weekly scans of our management network. In the past, nCircle has caused issues with Cisco devices (specifically ssh) but newer versions of IOS code have fixed those issues. If I had to bet money my guess is that it's nCircle again so I've asked the nCircle admin to stop scanning the management network. However, I figured I'd post this here just in case somebody else has had an issue with ssh on NX-OS after adding to Prime Infrastructure.
