18.3.3 NDP

(1) ProxyNDP

You can run Proxy NDP on all interfaces in the Switch connected to Ethernet networks. When the Switch receives a Neighbor Solicitation message that satisfies all of the following conditions, the Switch sends a Neighbor Advertisement message on behalf of the destination protocol indicated by the destination protocol address:

• The destination protocol address in the Neighbor Solicitation message is not a multicast address or anycast address.

• The network number of the source protocol address and that of the destination protocol address in the Neighbor Solicitation message are the same.

• The destination protocol address in the Neighbor Solicitation message exists in the routing table and is reachable.

(2) NDP entry-deletion criteria

If an NDP entry satisfies any of the condition below, that entry is deleted. (Note, however, that static NDP entries specified in the configuration are not deleted.)

• The communication with the IPv6 address indicated in the NDP entry has stopped and 10 minutes have elapsed.

• When the communication with the IPv6 address indicated in the NDP entry in stale status is resumed, the neighbor is no longer reachable.

• All NDP entries indicate neighbors that exist on interfaces that are down.

(3) Configuring Static NDP

To connect the Switch to a product that does not use NDP, use the ipv6 neighbor configuration command to associate Ethernet MAC addresses and IPv6 addresses (static NDP information).

(4) Viewing NDP Info

You can execute the show ipv6 neighbors command on an operation terminal to check NDP information. By checking NDP information, you can determine the association between the IPv6 address and the MAC address for a specific interface.