What do you mean you have two 1g ports bridged?
I'm going to assume he has a motherboard which has 2 onboard Gigabit NIC's, which offer a software based "teaming" solution, where you can bridge a connection. Therefore, if one connection goes down, it can use the backup with no interruption. It can increase throughput by a bit, and "prioritize" packets as well (Nvidia only).
So, to the OP...Nvidia board or something else? IE. DFI?
I was going to reply to this earlier, but had passed out.
I would think that it's putting a strain on the router, therefore causing the wireless to restart.
What drivers are you using for the "teaming"? What do your logs say?
You say you are connected via wireless for the laptop:
-What OS are you using?
-What adapter are you using?
-What drivers are you using?