Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 218

www.dell.com | support.dell.com IGMP Snooping Implementation Information • IGMP snooping on the Dell Force 10 operating system (FTOS) uses IP multicast addresses not MAC addresses. • IGMP snooping is not supported on stacked VLANs. • IGMP snooping is supported on all MXL 10/40GbE stack members. • IGMP snooping reacts to STP and MSTP topology changes by sending a general query on the interface that transitions to the forwarding state. Configuring IGMP Snooping Configuring IGMP snooping is a one-step process. That is, you enable it on a switch using the ip igmp snooping enable command from CONFIGURATION mode. To view the configuration, use the show running-config command from CONFIGURATION mode (Figure 12-6). To disable snooping for a VLAN, use the no ip igmp snooping command from INTERFACE VLAN mode. Figure 12-6. Enabling IGMP Snooping FTOS(conf)#ip igmp snooping enable FTOS(conf)#do show running-config igmp ip igmp snooping enable FTOS(conf)# Related Configuration Tasks • Enabling IGMP Immediate-leave • Disabling Multicast Flooding • Specifying a Port as Connected to a Multicast Router • Configuring the Switch as Querier Enabling IGMP Immediate-leave To configure the switch to remove a group-port association after receiving an IGMP Leave message, use the ip igmp fast-leave command from INTERFACE VLAN mode. To view the configuration, use the show config command from INTERFACE VLAN mode (Figure 12-7). Figure 12-7. Enabling IGMP Snooping FTOS(conf-if-vl-100)#show config ! interface Vlan 100 no ip address ip igmp snooping fast-leave shutdown FTOS(conf-if-vl-100)# 216 | Internet Group Management Protocol (IGMP)