4.11. Multicast Router Discovery (MRD)
Multicast Router discovery is a general mechanism that allows for the discovery of multicast routers. It does not depend on a specific multicast routing protocol. It is specified in RFC 4286 and introduces three new message types:
All MRD messages are sent with an IPv6 Hop Limit of 1 and contain the Router Alert Option.
Now that you know how all the cool functionality of IPv6 works, the next chapter discusses what you need to know about security with IPv6.