Netgear M4300-24X (XSM4324CS) - Stackable Switches with Full PoE+ Provisioning ソフトウェアガイド

This section describes the commands you use to configure IGMP snooping. The switch 
supports IGMP Versions 1, 2, and 3. The IGMP snooping feature can help conserve 
bandwidth because it allows the switch to forward IP multicast traffic only to connected hosts 
that request multicast traffic. IGMPv3 adds source filtering capabilities to IGMP versions 1 
and 2.

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.

This command enables IGMP Snooping on the system (Global Config Mode), an interface, or 
a range of interfaces. This command also enables IGMP snooping on a particular VLAN 
(VLAN Config Mode) and can enable IGMP snooping on all interfaces participating in a 
VLAN.

If an interface has IGMP Snooping enabled and you enable this interface for routing or enlist 
it as a member of a port-channel (LAG), IGMP Snooping functionality is disabled on that 
interface. IGMP Snooping functionality is re-enabled if you disable routing or remove 
port-channel (LAG) membership from an interface that has IGMP Snooping enabled.

The IGMP application supports the following activities: 

Validation of the IP header checksum (as well as the IGMP header checksum) and 
discarding of the frame upon checksum error.

Maintenance of the forwarding table entries based on the MAC address versus the IP 
address.

Flooding of unregistered multicast data packets to all ports in the VLAN.

Default

Enabled

Format

set igmp [vlan-id]

Mode

Global Config

Interface Config

VLAN Config