IPv6 Neighbor Discovery

The Neighbor Discovery feature for IPv6 uses IPv6 ICMP messages to perform the following tasks:

• Determine the link-layer address of a neighbor on the same link.
• Verify that a neighbor is reachable.
• Track neighbor routers.

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.
• Router advertisement messages:
  • Interval between router advertisement messages.
  • Value that indicates a router is advertised as a default router (for use by all nodes on a link).
  • Prefixes advertised in router advertisement messages.
  • Flags for host stateful autoconfiguration.
  

  Note

  For all solicitation and advertisement messages, SLX-OS uses seconds as the unit of measure instead of milliseconds.
• Amount of time during which an IPv6 node considers a remote node reachable (for use by all nodes on a given link).
• The interval after which the IPv6 Neighbor Discovery cache is deleted or refreshed.
• Limit the number of entries that can be stored in the IPv6 Neighbor Discovery Cache. This configuration can be set globally or at all L3 interfaces.

Note

Neighbor Discovery is not supported on tunnel interfaces.