I setup a 4402 this evening an everything was going great. The unit had v126.96.36.199, I need to upgrade to v188.8.131.52.
The upgrade guide requires the following upgrade path v184.108.40.206 > v220.127.116.11 > v18.104.22.168.
I began with the upgrade to .176 and everything was fine. HTTPS / SSH2 was working fine. I could ping the WLC and see both ports from the neighboring switch (cdp neigh). Then I upgrade to ver 22.214.171.124 and I could no longer HTTPS / SSH2 to the WLC. CDP neigh on the connecting switch no longer recognized one of the uplinks.
I have the switch (a Cisco 4507R) configured with a port-channel to the two WLC ports (1 and 2), the WLC is configured with LAG enabled. The port channel was still up as were both ports and no errors in the switch log.
I checked (via Console) the WLC management vlan... that seemed fine. My IP info was fine... Im sure im just overlooking something very minor... any suggestions would be greatly appreciated. I think after sitting here for so long and trying to find it, Im having tunnel vision.
Thanks in advance!