SW2 (config-if-range)channel-group 1 mode desirable. Ether-channel is made by combining multiple physical links that are seen as one link between two switches.
The possible combination to establish an ether-channel between SW1 and SW2 using LACP or PAgP .Ether-channel is a port link aggregation technology or port channel architecture used primarily on Cisco.
Ether-channel is used for providing fault tolerance and high-speed links between switches,routers and servers.To form an Ether-channel there are 2 protocol and link aggregation control protocol.Also load balances traffic across links in the bundle.Traffic is not necessarily distributed equally among all the links. Ether-channel will double or quadruple your bandwidth.
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