3Com 9100 manual Enable igmp vlan name, Enable igmp snooping

IGMP Overview 65

the switch is configured to perform IGMP snooping and there is no other reliable querier on the network.

IGMP configuration commands are described in Table 18.

Table 18 IGMP Configuration Commands

Command	Description
enable igmp {vlan <name>}	Enables IGMP. If no VLAN is specified, IGMP is
	enabled on all interfaces. The default setting is
	enabled.
enable igmp snooping	Enables IGMP snooping on the switch. If
{forward-mcrouter-only}	forward-mcrouter-only is specified, the
	switch forwards all multicast traffic to the
	multicast router, only. Otherwise, the switch
	forwards all multicast traffic to any IP router.

config igmp <query_interval> <query_response_interval> <last_member_query_interval>

Configures the IGMP timers. Timers are based on RFC2236. Specify the following:

■query_interval — The amount of time, in seconds, the system waits between sending out General Queries. The range is 1 to 2,147,483,647 seconds (68 years). The default setting is 125 seconds.

■query_response_interval — The maximum response time inserted into the periodic General Queries. The range is 1 to 25 seconds. The default setting is 10 seconds.

■last_member_query_interval — The maximum response time inserted into a Group-Specific Query sent in response to a Leave group message. The range is 1 to 25 seconds. The default setting is 1 second.

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