Command Reference Guide

MLD Snooping Querier Commands
CLI Command Reference
September 2014 Page 443
HP Moonshot Switch Module CLI Command Reference
MLD Snooping Querier Commands
In an IPv6 environment, MLD Snooping requires that one central switch or router periodically query all end-
devices on the network to announce their multicast memberships. This central device is the MLD 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 you use to configure and display information on MLD Snooping queries
on the network and, separately, on VLANs.
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.
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.
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.
Default disabled
Format
set mld querier vlan-id [address ipv6_address]
Mode VLAN Mode
Default disabled
Format
set mld querier [address ipv6_address]
Mode Global Config
Format
no set mld querier [vlan-id][address]
Mode VLAN Mode