Netgear M4100-24G-POE+ 사용자 설명서

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

show mac-address-table igmpsnooping

 

Use this command to display the multicast filtering details for a given VLAN.

show mac address-table multicast filtering

The following shows example CLI display output for the command. 

(netgear switch) #show mac address-table multicast filtering 1 

VLAN-ID....... 1 

Mode.......... Forward-Forbidden-Unregistered

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 about IGMP 
Snooping Queriers on the network and, separately, on VLANs. 

Privileged EXEC

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. 

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).

The text description of this multicast table entry. 

The list of interfaces that are designated for forwarding (Fwd:) and filtering (Flt:).

Privileged EXEC

A valid VLAN ID

The filtering mode