From ICM manual: Equal-cost multipath (ECMP) routing has several features and functions: * ECMP routing increases the north-south communication bandwidth by combining multiple uplinks. * ECMP routing performs traffic load balancing. * ECMP routing provides fault tolerance for failed paths. * A maximum of eight ECMP paths are supported. * Hashing is based on 2-tuple IP source and destination addresses. * ECMP routing is only available on Tier-0 gateways.
