Enabling Mldv2; Enabling Source Specific Multicast; Setting The Query Interval - Dell PowerConnect B-RX Configuration Manual

Enabling MLDv2

MLDv1 is enabled once PIM Sparse (PIM-SM) is enabled on an interface. You then enable version 2
of MLD, the version that supports source filtering.
MLDv2 interoperates with MLDv1. MLDv1 messages are understood by MLDv2. When an IPv6
router detects that the node is operating in MLDv1 mode, the router switches to MLDv1 for that
node even though queries are sent in MLDv2. To enable PIM-SM, do the following.
1. Enable IPv6 PIM mode by entering a command such as the following.
2. At the interface level enable MLDv2 by entering the following commands.
3. Once PIM-SM is enabled, specify which version of MLD will be used by entering the following
Enter 1 or 2 for <version-number>. Be sure to enter "2" if you want to use source filtering.

Enabling source specific multicast

Once MDLv2 is enabled, source specific multicast for PIM can be enabled for multicast group
addresses in the ff30::0/16 IPv6 address range. If MLDv2 is enabled, but SSM is not, the IPv6
router builds the Shortest Path Tree (SPT) as well as the shared (RP) tree and produces a (*.G)
record. If both MLDv2 and SSM are enabled, then only the SPT is built to produce a (S,G) record.
To enable SSM on a Brocade device running PIM-SM, enter commands such as the following.
BigIron RX(config)# ipv6 router pim
BigIron RX(config-ipv6-pim-router)# ssm-enable
Syntax: [no] ssm-enable
Enter the ssm-enable command under the IPv6 router PIM level to globally enable source specific
multicast filtering.

Setting the query interval

You can define the frequency at which MLD query messages are sent. For example, if you want
queries to be sent every 50 seconds, enter a command such as the following.
BigIron RX(config)#ipv6 mld query-interval 50
Syntax: ipv6 mld query-interval <seconds>
Specify 1 – 3600 for <seconds>. The default is 60 seconds.
BigIron RX Series Configuration Guide
53-1001986-01
Multicast Listener Discovery and source specific multicast protocols (MLDv2)
BigIron RX(config)#ipv6 router pim
BigIron RX(config-ipv6-pim-router)#
Syntax: [no] ipv6 router pim
BigIron RX(config)#interface ethernet 1/1
BigIron RX(config-if-e10000-1/1)#ipv6 pim-sparse
Syntax: [no] ipv6 pim-sparse
command.
BigIron RX(config-if-e10000-1/1)#ipv6 mld port-version 2
Syntax: ipv6 mld port-version <version-number>
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