How does GBIC and STP work ?
For trunks,
I know that when you connect 2 switches together via regular ports you need 2 ports connected on both switches via crossover. Then STP blocks one of the ports on the non-root bridge.
I also know that you can setup etherchannel so that STP sees both ports on each switch as one.
My question is if I connect both switches via single GBIC modules, how does STP work ? Do I need to use 2 GBIC modules on each switch connected to eachother ?
Also, if I'm using newer switches like 3550 and 3750, then I do not need to use a crossover cable for trunks between switches, correct ?