Igmp Snooping Querier Commands - D-Link DWS-4000 Series Cli Command Reference

show mac-address-table igmpsnooping
This command displays the IGMP Snooping entries in the MFDB table.
Format
show mac-address-table igmpsnooping
Mode Privileged EXEC
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 01:23:45:67:89:AB. In an IVL
system the MAC address is displayed as a MAC address and VLAN ID combination of 8 bytes.
Type The type of the 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:).
IGMP S
NOOPING
IGMP 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 "IGMP Querier". The IGMP query responses, known as IGMP 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 commands used to configure and display information on IGMP Snooping Queriers on the network
and, separately, on VLANs.
set igmp querier
Use this command to enable IGMP Snooping Querier on the system, using Global Config mode, or on a VLAN. Using this
command, you can specify the IP Address that the Snooping Querier switch should use as the source address while
generating periodic queries.
If a VLAN has IGMP Snooping Querier enabled and IGMP Snooping is operationally disabled on it, IGMP Snooping Querier
functionality is disabled on that VLAN. IGMP Snooping functionality is re-enabled if IGMP Snooping is operational on the
VLAN.
Note: The Querier IP Address assigned for a VLAN takes preference over global configuration.
The IGMP Snooping Querier application supports sending periodic general queries on the VLAN to solicit membership
reports.
Default disabled
Format
set igmp querier [<vlan-id>] [address ipv4_address]
Mode • Global Config
• VLAN Mode
Q C
UERIER OMMANDS

IGMP Snooping Querier Commands

125