Configuration Guide User guide

FastIron Configuration Guide 1639
53-1002494-02
MLD snooping configuration
Configuring the MLD mode for a VLAN
You can configure a VLAN for either the active or passive (default) MLD mode. The VLAN setting
overrides the global setting:
• Active – In active MLD mode, a device actively sends out MLD queries to identify IPv6 multicast
groups on the network, and makes entries in the MLD table based on the group membership
reports it receives from the network.
• Passive – In passive MLD mode, the device forwards reports to router ports which receive
queries. MLD snooping in the passive mode does not send queries. However, it does forward
queries to the entire VLAN.
To set the MLD mode for VLAN 20 to active, enter the following commands.
Brocade(config)#vlan 20
Brocade(config-vlan-20)#mld-snooping active
Syntax: [no] mld-snooping active | passive
Disabling MLD snooping for the VLAN
When MLD snooping is enabled globally, you can disable it for a specific VLAN. For example, the
following commands disable MLD snooping for VLAN 20. This setting overrides the global setting
for VLAN 20.
Brocade(config)#vlan 20
Brocade(config-vlan-20)#mld-snooping disable-mld-snoop
Syntax: [no] mld-snooping disable-mld-snoop
Configuring the MLD version for the VLAN
You can specify the MLD version for a VLAN. For example, the following commands configure VLAN
20 to use MLDv2.
Brocade(config)#vlan 20
Brocade(config-vlan-20)#mld-snooping version 2
Syntax: [no] mld-snooping version 1 | 2
When no MLD version is specified, the globally-configured MLD version is used. If an MLD version
is specified for individual ports, these ports use that version, instead of the version specified for
the VLAN.
Configuring the MLD version for individual ports
You can specify the MLD version for individual ports in a VLAN. For example, the following
commands configure ports 0/1/4, 0/1/5, 0/1/6 and 0/2/1 to use MLDv2. The other ports use the
MLD version specified with the mld-snooping version command, or the globally configured MLD
version.
Brocade(config)#vlan 20
Brocade(config-vlan-20)#mld-snooping port-version 2 ethe 0/2/1 ethe 0/1/4 to
0/1/6