IPv6 Router Discovery

ICMPv6 Router Discovery Protocol is an IETF standard protocol.

It lets hosts running an ICMPv6 router discovery client:

  • Dynamically find other IPv6 nodes.

  • Find available routers and Domain Name System (DNS) servers.

  • Learn prefixes and configuration parameters related to address configuration.

  • Autoconfigure addresses and make relationships between link layer addresses and IPv6 addresses of other nodes.

  • Find out if a neighbor is reachable and maintaining paths to other active neighbor nodes.

  • Find duplicated addresses.

GaiaClosed Check Point security operating system that combines the strengths of both SecurePlatform and IPSO operating systems. acts as an ICMPv6 router discovery server. It can advertise itself as a candidate default router, but it will not make a router its default router using the IPv6 Router Discovery protocol.

IPv6 Router Discovery and VRRP

To support VRRP for IPv6 interfaces, only the router in a VRRP Master state sends router discovery advertisements.

The VRRP Master sends the advertisements with the Virtual IP address as the source address and the Virtual MAC address as the MAC address.

Routers in VRRP Backup state do not send router discovery advertisements.

When VRRP failover occurs, the new VRRP Master begins to send out router discovery advertisements.