I have just upgraded a single production switch from IOS 12.2(50)SE1 to 15.0(2)SE5 to test out new ipv6 security features that we will soon require for our deployment. upon booting into the newer IOS the DHCP snooping feature stopped working, this caused ARP inspection to start dropping traffic so we had to disable it. after going through the normal troublehsooting procedures (check config, reboot, re-apply config, check clients, renew IP address etc) it still is not working.
has anyone else experience this problem or anything similar?
I would be interested to hear from people on recent experiences when upgrading software as we have been having a bad time recently with cisco software across a range of products.
