I have a 2651 w/ 2 10/100 ports. I'm trunking on 1 interface (running 2 subinterfaces).
What we've noticed is if you 'ping' out to 1 somebody in the vlan-a segment - all is well, unless there is a connection to someone in the vlan-b segment.
The 2900 connects to a 3500. I don't see any high utilization, but I do see circuit transitions. Both router and switch are configured 100 full..
Any info would be great.