Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 210)

198 Multi-Service IronWare Multicast Configuration Guide
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IPv6 Multicast Listener Discovery snooping
2
Use the no form of the command to disable IPv6 PIM-SM traffic snooping.
Globally configuring the query interval
If IPv6 Multicast Traffic Reduction is set to active mode, you can configure the query interval, which
specifies how often a device is enabled for active IPv6 Multicast Traffic Reduction sends Group
Membership queries.
NOTE
The query interval applies only to the active mode of IPv6 Multicast Traffic Reduction.
To configure the query interval, enter the following command.
Brocade(config)# ipv6 multicast query-interval 120
Syntax: [no] ipv6 multicast query-interval interval
The interval parameter specifies the interval between queries. You can specify a value from 10
through 600 seconds. The default is 125 seconds.
Setting the MLD version
You can use the ipv6 multicast version command to set the MLD version (1 or 2) globally for IPv6
multicast. You can select the version of MLD by entering the following command.
Brocade(config)# ipv6 multicast version 2
Syntax: ipv6 multicast version version-number
Enter 1 or 2 for the version-number. The default is version 1.
Configuring IPv6 multicast tracking and fast-leave
When IPv6 multicast tracking is configured, MLD fast-leave is enabled. MLD Leave Processing for
MLDv1 is initiated by a receiver sending a Leave message. The router sends out a group-specific
query to solicit reports from other receivers. The multicast group entry is maintained for 3 seconds
to allow the processing of reports from any receivers on the LAN segment. If there are no receivers,
the multicast stream is pruned.
MLD fast-leave allows a receiver to move from one multicast group to another instantly if it is the
only receiver on the segment subscribed to the group. When a layer 3 switch receives a Leave
message, it sends a group-specific query to see if any other receivers are present. The multicast
group state is maintained for 3 seconds to process any MLD group reports from other receivers. If
there are no other receivers, the multicast group entry prunes the receiver LAN segment, stopping
traffic instantly.
MLDv2 also supports fast-leave processing. When an MLDv2 receiver changes the mode to
Exclude, and there are no other receivers on that interface, the multicast group entry prunes the
receiver LAN segment.
To enable IPv6 multicast tracking globally, enter the following command.
Brocade(config)# ipv6 multicast tracking
Syntax: [no] ipv6 multicast tracking
The no form of this command disables the tracking process globally.