Kontron AT8404 CLI - Manual (Page 144)

Switching Commands AT8404
AT8404 CLI Reference Manual Page 2 - 108
2.21 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.
2.21.1 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.
2.21.1.1 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.
2.21.2 set mld querier query_interval
Use this command to set the MLD Querier Query Interval time. It is the amount of time in seconds that the switch
waits before sending another general query.
Term Definition
MAC Address A multicast MAC address for which the switch has forwarding or filtering information. The
format is two-digit hexadecimal numbers that are separated by colons, for example
33:33:45:67:89:AB. In an IVL system, the MAC address is displayed as a MAC address and
a VLAN ID combination of 8 bytes.
Type The type of entry, which is either static (added by the user) or dynamic (added to the table as
a result of a learning process or protocol.)
Description The text description of this multicast table entry.
Interfaces The list of interfaces that are designated for forwarding (Fwd:) and filtering (Flt:).
Default disabled
Format set mld querier [<vlan-id>] [address ipv6_address]
Mode • Global Config
• VLAN Mode
Format no set mld querier [<vlan-id>][address]
Mode • Global Config
• VLAN Mode