Quick Reference Guide

78 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Configuring IPv6 neighbor discovery
5
An IPv6 host is required to listen for and recognize the following addresses that identify itself:
• Link-local address.
• Assigned unicast address.
• Loopback address.
• All-nodes multicast address.
• Solicited-node multicast address.
• Multicast address to all other groups to which it belongs.
You can adjust the following IPv6 neighbor discovery features:
• Neighbor solicitation messages for duplicate address detection.
• Amount of time during which an IPv6 node considers a remote node reachable (for use by all
nodes on a given link).
Configuration notes
NOTE
For all solicitation and advertisement messages, Dell uses seconds as the unit of measure instead
of milliseconds.
• If you add a port to a port-based VLAN, and the port has IPv6 neighbor discovery configuration,
the system will clean up the neighbor discovery configuration from the port and display the
following message on the console.
ND6 port config on the new member ports removed
• Neighbor discovery is not supported on tunnel interfaces.
Neighbor solicitation and advertisement messages
Neighbor solicitation and advertisement messages enable a node to determine the link-layer
address of another node (neighbor) on the same link. (This function is similar to the function
provided by the Address Resolution Protocol [ARP] in IPv4.) For example, node 1 on a link wants to
determine the link-layer address of node 2 on the same link. To do so, node 1, the source node,
multicasts a neighbor solicitation message. The neighbor solicitation message, which has a value
of 135 in the Type field of the ICMP packet header, contains the following information:
• Source address: IPv6 address of node 1 interface that sends the message.
• Destination address: solicited-node multicast address (FF02:0:0:0:0:1:FF00::/104) that
corresponds the IPv6 address of node 2.
• Link-layer address of node 1.
• A query for the link-layer address of node 2.
After receiving the neighbor solicitation message from node 1, node 2 replies by sending a
neighbor advertisement message, which has a value of 136 in the Type field of the ICMP packet
header. The neighbor solicitation message contains the following information:
• Source address: IPv6 address of the node 2 interface that sends the message.
• Destination address: IPv6 address of node 1.
• Link-layer address of node 2.