SonicOSX 7 System

Neighbor Discovery

The Neighbor Discovery Protocol (NDP) is a messaging protocol that was created as part of IPv6 to perform a number of the tasks that ICMP and ARP are able to accomplish with IPv4. Just like ARP, Neighbor Discovery builds a cache of dynamic entries, and you can configure static Neighbor Discovery entries. The IPv4/IPv6 neighbor table shows the IPv6 neighbor messages and functions that are analogous to the traditional IPv4 neighbor messages.

Static NDP Entries

IPv4.IPv6 Neighbor Messages and Functions
IPv4 Neighbor Message IPv6 Neighbor Message
ARP request message Neighbor solicitation message
ARP reply message Neighbor advertisement message
ARP cache Neighbor cache
Gratuitous ARP Duplicate address detection
Router solicitation message (optional) Router solicitation (required)
Router advertisement message (optional) Router advertisement (required)
Redirect message Redirect Message

The Static NDP feature allows for static mappings to be created between a layer 3 IPv6 address and a Llayer 2 MAC address.

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