BGP Add Path with selective Multipath advertisements

This feature extends BGP Add Path (BGP-AP) support by optionally enabling restrictions on BGP-AP to advertise contributor multiple paths only. Advertising all available multiple paths might result in a large overhead of processing on device memory and is a scaling consideration, too. You can limit and configure up to six prefixes that the BGP multipath algorithm selects. Selective advertising of multiple paths facilitates ISPs and data centers that use route reflectors to build in-path diversity in IBGP.