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Routing Protocols

  • Minimum ECMP (QFX5130-32CD, QFX5130-48C, QFX5220, QFX5230-64CD, QFX5240-64OD, and QFX5240-64QD)—We support conditional advertising and withdrawal of BGP routes based on certain constraints such as bandwidth and minimum available next-hop ECMP. When a BGP receiver learns the same route from multiple BGP peers, BGP updates the active BGP path and the routing information base (RIB), also known as the routing table. The BGP export policy determines whether to advertise the BGP route to these next hops based on the number of ECMP BGP peers it receives the prefix from. A BGP route that has multiple ECMP BGP peers creates better resiliency in case of link failures. You can configure a BGP export policy to withdraw a BGP route unless it receives the BGP route prefix from a minimum number of ECMP BGP peers.

    [See link.]