we currently have 4 100mb cisco 3500 48 port switches. i am changing them to 4 cisco 2960 48 port gig switches shortly. i want to connect the switches to each other via 2 port etherchannel. am i right in saying then that this will give me 2 Gig links between the switches. is it easy to configure this ?? can you help me with it? and also what speed does fibre connect at?