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- General Query: to learn which multicast address have multicast listeners.
- Multicast address specific query: to learn if a particular multicast address has any listeners.
- Multicast Address and Source Specific Queries: to learn if any of sources from the specified list for
the particular multicast address has any listeners.
There are a number of different types of Multicast Address Records that may be included in a MLDv2
Report message:
"Current State Record" : is sent by a node in response to a Query received on an interface.
"Filter Mode Change Record": is sent by a node whenever a local invocation of
IPv6MulticastListen causes a change of the filter mode (i.e., a change from INCLUDE to
EXCLUDE, or from EXCLUDE to INCLUDE) of the interface-level state entry for a particular
multicast address, whether the source list changes at the same time or not.
"Source List Change Record": is sent by a node whenever a local invocation of
IPv6MulticastListen causes a change of source list that is *not* coincident with a change of
filter mode, of the interface-level state entry for a particular multicast address.
3.10.1.1. MLD Snooping Configuration Example
Figure 3-17: MLD Snooping Topology
Switch-1 MLD Snooping Configuration
Step 1. Enable MLD Snooping on admin mode
(Switch-1) (Config)#ipv6 mld snooping
Step 2. Enable MLD Snooping on VLAN 1.
(Switch-1) (Config)#vlan database
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