I am trying to configure a SPAN session from one Ethernet port to another on an ISR 2811 running IOS 12.4(13r)T. Specifically from Fa0/1/0 to Fa0/1/7. Both are configured:
switchport access vlan 32
duplex full
speed 100
spanning-tree portfast
The monitor session is configured as:
mon sess 1 source int Fa0/1/0
mon sess 1 dest int Fa0/1/7
Almost every packet I see is a broadcast or multicast packet, with a very few unicast packets thrown in (all of which originate from the source port). Needless to say I should be seeing hundreds of unicast packets in both directions. Has anyone run into this before? It's driving me nuts. I've tried all kinds of configurations on the destination port but no joy.
