LevelOne GTL-2691 - Manual (Page 538)

C HAPTER 15 | Multicast Filtering
MLD Snooping (Snooping and Query for IPv6)
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Figure 309: Configuring IGMP Filtering and Throttling Interface Settings
MLD S NOOPING (S NOOPING AND Q UERY FOR IP V 6)
Multicast Listener Discovery (MLD) snooping operates on IPv6 traffic and
performs a similar function to IGMP snooping for IPv4. That is, MLD
snooping dynamically configures switch ports to limit IPv6 multicast traffic
so that it is forwarded only to ports with users that want to receive it. This
reduces the flooding of IPv6 multicast packets in the specified VLANs.
There are two versions of the MLD protocol, version 1 and version 2.
MLDv1 control packets include Listener Query, Listener Report, and
Listener Done messages (equivalent to IGMPv2 query, report, and leave
messages). MLDv2 control packets include MLDv2 query and report
messages, as well as MLDv1 report and done messages.
Remember that IGMP Snooping and MLD Snooping are independent
functions, and can therefore both function at the same time.
C ONFIGURING MLD
S NOOPING AND Q UERY
P ARAMETERS
Use the Multicast > MLD Snooping > General page to configure the switch
to forward multicast traffic intelligently. Based on the MLD query and report
messages, the switch forwards multicast traffic only to the ports that
request it. This prevents the switch from broadcasting the traffic to all
ports and possibly disrupting network performance.
CLI R EFERENCES
◆ "MLD Snooping" on page 1217
P ARAMETERS
These parameters are displayed:
◆ MLD Snooping Status – When enabled, the switch will monitor
network traffic to determine which hosts want to receive multicast
traffic. (Default: Disabled)
◆ Querier Status – When enabled, the switch can serve as the querier
for MLDv2 snooping if elected. The querier is responsible for asking
hosts if they want to receive multicast traffic. (Default: Disabled)