Brocade Communications Systems IPMC5000PEF Enabling MLDv2, Setting the group membership time

Enabling MLDv2

The source list and filter mode are created when the IPv6 querier router sends a query. The querier router is the one with the lowest source IPv6 address. It sends out any of the following queries:

•General query - The querier sends this query to learn all multicast addresses that need to be listened to on an interface.

•Address specific query - The querier sends this query to determine if a specific multicast address has any listeners.

•Address specific and source specific query - The querier sends this query to determine if specified sources of a specific multicast address have any listeners.

In response to these queries, multicast listeners send the following reports:

•Current state - This report specifies the source list for a multicast address and whether the filter mode for that source list is INCLUDE or EXCLUDE.

•Filter-mode change - This report specifies if there has been a change to the filter mode for the source list and provides a new source list.

•Source list change - This report specifies the changes to the source list.

MLDv1 is compatible with IGMPv2 and MLDv2 is compatible with IGMPv3.

Enabling MLDv2

The default MLD version when PIM Sparse Mode (PIM-SM) is enabled on an interface is MLDv1. You must configure the ipv6 mld version 2 command to enable MLDv2.

To enable MLDv2, enter the following command at the interface level.

device(config)# ipv6 router pim device(config-if-e10000-1/1)# ipv6 mld version 2

Syntax: [no] ipv6 mld version 2

Configuring MLD parameters for default and non-default VRFs

MLD allows you to configure the following parameters on default and non-default VRFs:

•Group membership time - Setting the group membership time on page 197

•Max group address - Defining the maximum number of MLD group addresses on page 198

•Max response time - Setting the maximum response time on page 198

•Query interval - Setting the query interval on page 199

•Last listener query count - Setting the last listener query interval on page 199

•Last listener query interval - Setting the last listener query interval on page 199

•Robustness - Setting the robustness on page 199

•Version - Setting the version on page 200

Setting the group membership time

You can set the group membership time for the default VRF or for a specified VRF. Group membership time defines how long a group will remain active on an interface in the absence of a group report. Possible values are from 5 through 26,000 seconds and the default value is 260 seconds.

To define an MLD group membership time of 2000 seconds, enter the following command.

device(config)# ipv6 mld group-membership-time 2000

Syntax: [no] ipv6 mld group-membership-time 5-26000

FastIron Ethernet Switch IP Multicast Configuration Guide	197
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