Reference Guide

Querier. The MLD query responses, known as MLD reports, keep the switch updated with the current
multicast group membership on a port-by-port basis. If the switch does not receive updated
membership information in a timely fashion, it will stop forwarding multicasts to the port where the end
device is located.
This section describes the commands used to configure and display information on MLD Snooping
queries on the network and, separately, on VLANs.
Note
This feature is available for 220 switches only.
Note
This note clarifies the prioritization of MGMD Snooping Configurations. Many of the
IGMP/MLD Snooping commands are available both in the Interface and VLAN modes.
Operationally the system chooses or prefers the VLAN configured values over the Interface
configured values for most configurations when the interface participates in the VLAN.
set mld querier
Use this command to enable MLD Snooping Querier on the system (Global Config Mode) or on a VLAN.
Using this command, you can specify the IP address that the snooping querier switch should use as a
source address while generating periodic queries.
If a VLAN has MLD Snooping Querier enabled and MLD Snooping is operationally disabled on it, MLD
Snooping Querier functionality is disabled on that VLAN. MLD Snooping functionality is re-enabled if
MLD Snooping is operational on the VLAN.
The MLD Snooping Querier sends periodic general queries on the VLAN to solicit membership reports.
Default
disabled
Format set mld querier [vlan-id] [address ipv6_address]
Mode
•
Global Config
•
VLAN Mode
no set mld querier
Use this command to disable MLD Snooping Querier on the system. Use the optional parameter address
to reset the querier address.
Format
no set mld querier [vlan-id][address]
Mode
•
Global Config
•
VLAN Mode
Switching Commands
ExtremeSwitching 200 Series: Command Reference Guide for version 01 .02.04.0007 451