In this scenario I have a stacked 3750 doing the core routing for the building. Less than a 50 users, 6 racks of equipment on the 2nd floor and the core switch-router on the 3rd floor. Certain vlans span the 2nd and 3rd floor. The question has been raised as to whether or not having traffic from the 2nd floor come up the 3rd floor and back to the 2nd floor can become an issue.
Currently there is a 2 port gig etherchannel (can add 1 more port) between the core switch-router and the core 2nd floor switch. All switches in the racks (on 2nd floor) are connected to the core 2nd floor switch. Therefore, if data from a user computer on the 2nd floor wants to reach a computer on the test vlan on the 2nd floor it needs to go up/down the pipe to get there.
Is that necessarily bad or considered poor configuration?