Brocade Communications Systems IPMC5000PEF Manual De Usuario

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 - 

 on page 197

•

Max group address - 

 on page 198

•

Max response time - 

 on page 198

•

Query interval - 

on page 199

•

•

Last listener query interval - 

on page 199

•

 on page 199

•

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

Enabling MLDv2