there is a server with 2 or 4 interfaces grouped in teaming, connected to 6500 switch ports in etherchannel, using trunk with 2 VLANs allowed (eg. 20 & 40)
On the other port a PC connected to access port in one of these VLANs sees a lo of the unicast traffic sourced from and destined to the server connected to etherchannel ports.
How can it be controlled?
if the server is sending traffic to a destination MAC address that is not speaking the switches flood the frames on every port on that vlan (unicast flooding)
you should check if the destination MAC address(es) of server traffic are in the CAM table or not.
Hope to help