16.6 NDP

16.6.1 Overview

NDP (Neighbor Discovery Protocol), a key protocol of the IPv6 stack, can be used for obtaining the link address information of other neighbor nodes connected with the local nodes.

Similar to the ARP (Address Resolution Protocol) of the IPv4 stack, NDP can perform address transformation between the network layer and the link layer. The difference is that NDP uses ICMPv6 (Internet Control Message Protocol version 6) and multicast to manage the information exchanged among the neighbored nodes (within the same link), and keeps the address mapping between the network layer and the link layer in the same subnet.

16.6.2 Configuration Example

• web UI:

Select System Configuration > Basic Networking > ARP. Click the Add action link in the NDP Configuration area, specify parameters in the Add NDP area and click the Save action link.

• CLI:

Execute the following command to configure the NDP entry:

ipv6 ndp <ipv6_address> <mac_address>

For example:

FortiBalancer(config)#ipv6 ndp bb::55 00:21:9C:45:80:9F