Netgear XSM7224S User Manual download pdf (Page 192)

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ProSafe XSM7224S Managed Stackable Switch CLI Manual, Software Version 9.0

Switching Commands 3-151

v1.0, November 2010

show mac-address-table igmpsnooping

This command displays the IGMP Snooping entries in the MFDB table.

IGMP Snooping Querier Commands

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.

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:).

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