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.

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PFE support for BGP bandwidth unequal load balancing (QFX5220, QFX5230, and QFX5240)— The Packet Forwarding Engine (PFE) for the QFX5220, QFX5230, and QFX5240 models now supports BGP bandwidth unequal load balancing. This feature enables asymmetric traffic distribution based on path cost, optimizing BGP traffic across paths with different bandwidths. By considering the cost of next-hop paths, the PFE ensures efficient utilization of network resources. The control plane calculates balance values for each path, and the PFE uses those values to distribute traffic proportionally. This capability is crucial for scenarios that involve unequal cost paths, enhancing overall network performance.