Dell PowerConnect 6248 Configuration Guide - Page 43
IGMP Snooping Querier, CLI Examples, Example #1: Enable IGMP Snooping Querier on the Switch
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Multicast Packets Received 626494 Broadcast Packets Received 0 console#show statistics ethernet 1/g10 ... Total Packets Received Without Errors.......... 12 Unicast Packets Received 0 Multicast Packets Received 12 Broadcast Packets Received 0 IGMP Snooping Querier When PIM and IGMP are enabled in a network with IP multicast routing, the IP multicast router acts as the IGMP querier. However, if the IP-multicast traffic in a VLAN needs to be Layer 2 switched only, an IP-multicast router is not required. The IGMP Snooping Querier can perform the IGMP snooping functions on the VLAN. NOTE: Without an IP-multicast router on a VLAN, you must configure another switch as the IGMP querier so that it can send queries. When the IGMP snooping querier is enabled, the IGMP snooping querier sends out periodic IGMP queries that trigger IGMP report messages from the switch that wants to receive IP multicast traffic. The IGMP snooping feature listens to these IGMP reports to establish appropriate forwarding. CLI Examples The following examples show commands to use with the IGMP Snooping Querier feature. Example #1: Enable IGMP Snooping Querier on the Switch The first command in this example enables the IGMP snooping querier on the switch. The second command specifies the IP address that the snooping querier switch should use as the source address when generating periodic queries. console(config)#ip igmp snooping console(config)#ip igmp snooping querier console(config)#ip igmp snooping querier address 10.10.20.12 NOTE: The IGMP snooping feature must be enabled for the IGMP snooping querier function to operate. Switching Configuration 43