I am getting ready to upgrade to gigabit ethernet for my servers. This is mostly because of a need to upgrade my backup solution due to an increased volume of data. What I am wanting to do is this. I have 4 servers each with dual nics. Currently they are setup with Intel ProSet to Adaptive Load Balance. I want to team the nics to double the throughput not just load balance each other. I think that 802.3ad (link aggregation) is what I need, Could someone please confirm this or point me in the right direciton. Do I need to have a managed switch to accomplish this? Port Trunks?