Intel ZT 8101 10/100 IGMP Configuration, To configure IGMP snooping, Using the Telnet Console

Using the Telnet Console

2. Configure these fields.

Field	Description
	Enables or disables, globally, Internet Group Management Protocol
Switch IGMP Snooping	(IGMP) snooping. This protocol allows the switch to forward
	multicast traffic intelligently on the switch.
DVMRP State	Enables or disables, globally, the Distance-Vector Multicast Routing
	Protocol (DVMRP).
PIM-DM State	Enables or disables, globally, the Protocol Independent Multicasting
	- Dense Mode (PIM-DM) multicasting protocol.
DVMRP Include Report From	Enables or disables receiving DVMRP reports from unknown
Unknown Neighbors	neighbors.

3. Highlight APPLY and press Enter.

Each protocol has a corresponding configuration screen. You access these screens from the Layer 3 - IP Networking Setup screen.

IGMP Configuration

The Internet Group Management Protocol (IGMP) allows the switch to forward multicast traffic intelligently on the switch. The switch “snoops” the IGMP 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 that 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.From the Main Menu, select Layer 3 - IP Networking Setup IGMP Snooping Configurations and press Enter.

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