Igmp Configurations

Using the Web Console

The Internet Group Management Protocol (IGMP) allows the switch to forward multicast traffic intelligently on the switch. The switch “snoops” the IRMP query and report messages and forwards traffic only to the ports that request the multicast traffic. This prevents the switch from broadcasting the traffic to all ports and possibly affecting network performance.

IGMP requires a network device that learns about the presence of multicast groups on its subnets and keeps track of group membership. Multicasting is not connection oriented, so data is delivered to the requesting hosts on a best-effort level of service.

The switch has two configuration screens for IGMP:

•The IGMP snooping screen allows you to configure the switch for snooping and querying.

•The IGMP interface screen allows you to configure the switch to keep track of IGMP groups.

To configure IGMP snooping

1.In the left panel, click Layer 3 IP Networking.

2.In the top panel under IP Multicast Routing Protocols, click IGMP Snooping Configurations.

3.Select a VLAN and click Edit.

4.Configure these fields.

	Field	Description

		Specifies whether this VLAN should respond to IGMP queries. Three
		options are available:
	Querier State	• No—Prevents this VLAN from becoming a querier.
	Querier State	• V1—Enables the sending of IGMP query packets when needed.
		• V1—Enables the sending of IGMP query packets when needed.
		• V2—Enables the sending of IGMP query and leave packets according
		to the IGMP V2 specification.

	Query Interval	Specifies the time that can elapse between general IGMP queries. Enter a
	Query Interval	value between 1—65535 seconds. The default is 125.
		value between 1—65535 seconds. The default is 125.

	Robustness Variable	Specifies the permitted packet loss on a link. Enter a value between 2—255.
	Robustness Variable	The default is 2.
		The default is 2.

	Max Response	Specifies the maximum time the switch can wait for IGMP member reports.
	Max Response	Enter a value between 1—25. The default is 10 seconds.
		Enter a value between 1—25. The default is 10 seconds.

	State	Enables or disables learning about IGMP groups. If enabled, the switch
	State	limits multicast forwarding to active member ports.
		limits multicast forwarding to active member ports.

5. Click Apply.

The following conditions affect the fields on the IGMP snooping screen:

•The switch IGMP snooping flag must be enabled for these settings to have any effect.

•If the IGMP settings have been enabled for the IP interface associated with the VLAN you select, the only field available on the IGMP snooping screen is the State field.

128	Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User’s Manual

ZT 8101 10/100 specifications

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Intel ZT 8101 10/100 user manual Igmp Configurations, To configure Igmp snooping

Models: ZT 8101 10/100

Using the Web Console

IGMP Configurations

To configure IGMP snooping

Field

ZT 8101 10/100 specifications