What is MLDv2 protocol and where it is used ?

Question

0 reserved
1 interface-local scope
2 link-local scope
3 reserved
4 admin-local scope
5 site-local scope
6 (unassigned)
7 (unassigned)
8 organization-local scope
9 (unassigned)
A (unassigned)
B (unassigned)
C (unassigned)
D (unassigned)
E global scope
F reserved

MLDv2 scope with 0 and 1 (ff30 and ff31) MLDv2 report for joining the messages are sent but leaving the group is not sent ? Why is it so?

And Reserved like ff30/ ff3f/ ff33 can not be used when we send a query messages? Reserved in the sense its been reserved for future purpose is it ? Please clarify?

Answer 1

MLD stands for "Multicast listener discovery" protocol. It is mainly used by the router to check which are all nodes connected directly, have interest for a IP multicast address.
For more details, go through the following link:
http://www.networksorcery.com/enp/protocol/mld.htm