We have 2 Clustered File & Print servers setup using Legato CoStandby Server, each with an Intel Pro/100S Dual Port Server Adapter and a dedicated link between the servers. The ports on each card are configured as a Team, and are forced at Full duplex, 100 MB. On the Cisco 3524XL Switch, the ports are configured at Full duplex, 100 MB - but are not configured in a Port Group. With this configuration we were experiencing MAC Address Flapping on each switch that the servers were connected to. We also tried connecting each port to a different switch and received similar errors. I believe that our problem is due to the fact that the MAC address is the same for both ports on the dual port adapters, which was causing a loop between the 2 ports on the switches that the servers were connected? If this is true, could we hardcode the MAC address on both ports of the switch - or would we be better off scrapping the dual port adapter and using 2 separate NIC's?
I have this problem too.