BGP Load Balancing in proprotion to Bandwidth Community

The multipath option removes the tiebreakers from the active route decision process, thereby allowing otherwise equal cost BGP routes learned from multiple sources to be installed into the forwarding table. However, when the available paths are not equal cost, you may want to load-balance the traffic asymmetrically. This feature introduces support for a BGP link bandwidth extended community. This community encodes the bandwidth of a given BGP next hop, and when combined with multipath, the load-balancing algorithm distributes flows across the set of BGP next hops proportional to their relative bandwidths.