CCNP Enterprise Core (350-401) Cisco Routing

Equal-Cost Multipathing

When a routing protocol identifies multiple paths as a best path to a destination and the router supports multiple path entries. The router can install an additional router up a maximum number of paths per destination.

This is known as equal-cost multipathing or ECMP, providing load sharing across all links.

RIP, EIGRP, OSPF, and IS-IS all each support equal cost multipathing.

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