Mac flapping again

[John Blakley]

What would cause a printer to flap between an uplinked switch port and a port that's connected to our frame facing router?

John

[johnlloyd_13]

this might be a DHCP conflict for an IP address that's already assigned to another host or router. try to reserve the IP address of your router on your DHCP server.

[Ryan Carretta]

Is the router doing L2TPv3, AToM, or some other l2-over-l3 protocol mechanism? If the MAC address is seen flapping, chances are you are seeing some kind of layer-2 loop, so it would be appropriate to start checking layer-2 connections and protocols such as STP.