Configuration Guide User guide

1620 FastIron Configuration Guide
53-1002494-02
MLD snooping configuration
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 1/4, 1/5, 1/6 and 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 2/1 ethe 1/4 to 1/6
Syntax: [no] mld-snooping port-version 1 | 2 ethernet <port-numbers>
Configuring static groups to the entire VLAN or to
individual ports
NOTE
On FastIron X Series devices, you can configure MLD snooping static groups for individual ports in a
VLAN, but not for the entire VLAN.
A snooping-enabled VLAN cannot forward multicast traffic to ports that do not receive MLD
membership reports. To allow clients to send reports, you can configure a static group which
applies to the entire VLAN, or to individual ports on the VLAN. The maximum number of supported
static groups in a VLAN is 512, and the maximum number of supported static groups for individual
ports in a VLAN is 256. The static group forwards packets to the static group ports even if they
have no client membership reports. The static group for the entire VLAN is used in VLAN flooding
because it uses fewer hardware resources than the static group for individual ports. Configure a
static group for specific ports on VLAN 20 using commands similar to the following.