I like a bit of advise here. Setting up an network for a client. We have 2 cisco 3750 (Stacked) switches as a core. There is 5 floors altogether with 4 cisco 2960 on each floor. All the cableing is ca6 and there is 2 cat6e cables per switch on every floor (8 cat6e on each floor going to the 3750's). I am hopeing to get redundency by connecting a cable from each 2960 switch to each of the 3750 switches.
My question is whats the best way to configure this? EtherChannell or just use STP? I also have trunking setup and there will possible be 4 vlans. Also is there any sample configs you can advise me on.