3Com 3CBLSF26H manual Configuring Igmp Snooping, Defining Igmp Snooping

Configuring IGMP Snooping

This section contains information for configuring IGMP Snooping.

When IGMP Snooping is enabled, all IGMP packets are forwarded to the CPU. The CPU analyzes the incoming packets and determines:

z

z

z

Which ports want to join which Multicast groups.

Which ports have Multicast routers generating IGMP queries. Which routing protocols are forwarding packets and Multicast traffic.

Ports requesting to join a specific Multicast group issue an IGMP report, specifying that Multicast group is accepting members. This results in the creation of the Multicast filtering database.

This section contains the following topic:

zDefining IGMP Snooping

Defining IGMP Snooping

The IGMP Snooping Setup Page allows network managers to define IGMP Snooping parameters for VLANs.

Click Device > IGMP Snooping > Setup. The IGMP Snooping Setup Page opens.

Figure 3-37IGMP Snooping Setup Page

The IGMP Snooping Setup Page contains the following fields:

Table 3-28IGMP Snooping Setup Page item description

Item		Description
	Defines whether IGMP Snooping is enabled on the switch. The possible field
IGMP Snooping	values are:
		Enabled: Indicates that IGMP Snooping is enabled on the switch.
Status	z
	z Disabled: Indicates that IGMP Snooping is disabled on the switch. This is
		the default value.
	Defines whether IGMP Query is enabled on the switch. The possible field
	values are:
IGMP Query Status	z	Enabled: Indicates that IGMP Query is enabled on the switch.
	z Disabled: Indicates that IGMP Query is disabled on the switch. This is the
		default value.
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