When certain clients reconnect (namely Intel 82566DM-2 LAN Adapters) there is a flood of the following traffic.
Spanning -tree-(for-bridges)_01 CTRL MAC PAUSE: Quanta
It is causing massive outputs of traffic and spiking CPU on my core switch, causing temporary losses in connectivity. In addition DHCP acquiring for the client fails.
Has anyone seen this behaviour before?
I think it could be down to flow control issue between STP and the particular NIC.
When I disabled Portfast the issue goes away, which I think is going to be my temporary solution.
Catalyst 4510R. IOS Version 12.2(40)SG