I’ve been fighting a weird network gremlin for 3 weeks. About 2-3 times a day, various parts of the network become unreachable. It seems to vary each time it happens. I have noticed that discards-in on many core switch ports seem to increase during these blips. I’ve also noticed that every time it happens, I end up with a ton of BAD ADDRESS in DHCP. It seems to only happen during the week when users are onsite. I don’t think it’s rogue DHCP.
I’ve enabled DHCP snooping on the edge and DHCP flood protection and MAC address checking on the core and it doesn’t seem to have helped. Any ideas?
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