Traffic in an EtherChannel is distributed across the individual bundled links in a deterministic fashion. However, the load is not necessarily balanced equally across all the links. Instead, frames are forwarded on a specific link as a result of a hashing
algorithm. The algorithm can use source IP address, destination IP address, or a combination of source and destination IP addresses, source and destination MAC addresses,or TCP/UDP numbers.To set the load-distribution method among the ports in the bundle, use the port-channel load-balance command. Refer URL
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/cmdref/p1.htm#wp1021955