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ARP and IPv6 Neighbor Discovery use a neighbor cache to store neighbor address resolutions. The cache maintains the resolutions for an interval of time after which a refresh process begins.  During the refresh process, a number of ARP requests or IPv6 ND Neighbor Solicitations are sent to the neighbor until the neighbor either responds with an ARP reply or IPv6 ND Neighbor Advertisement.

The aggregate address minimum contributors feature adds the capability to specify a minimum number of contributor routes that must be present and advertisable in order for the BGP speaker to generate the route for the aggregate address.

ARP is a protocol that resolves an IPv4 neighbor address to a MAC address while IPv6 Neighbor Discovery is similar

RFC4191 describes an optional extension to Router Advertisement messages for communicating default router

ARP and IPv6 Neighbor Discovery use a neighbor cache to store neighbor address resolutions. The capacity of the neighbor cache is determined by the resources and capabilities of the device platform. The neighbor cache capacity feature adds a means to specify a per-interface capacity for the neighbor cache. A neighboring device, through misconfiguration or maliciousness, can unfairly use a large number of address resolutions. This feature can help to mitigate this over-utilization.

Unequal Cost Multi Path (UCMP) is a mechanism for forwarding traffic for an ECMP route by using a ratio of weights

The IPv6 Neighbor Discovery protocol performs Neighbor Unreachability Detection (NUD) in order to determine if two