I just upgraded from 3.3 to 3.5.1. We had our eth0 port plugged into a front panel port, as we do not have an oobm network. This was working just fine, and I could login via ssh to the switch.
Since the upgrade I cannot even ping the eth0 port. If I log into the switch via serial cable, I can ping eth0 internally, and it shows the proper ip address. I've tried ifdown and ifup on the port as well.
Is there any other troubleshooting ideas I can try?