Dell Force10 S25N-S50N FTOS Command Line Reference Guide FTOS 8.4.2.7 E-Series - Page 557
ip igmp snooping fast-leave, ip igmp snooping flood
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ip igmp snooping fast-leave c e s Enable IGMP snooping fast leave for this VLAN. Syntax ip igmp snooping fast-leave To disable IGMP snooping fast leave, use the no igmp snooping fast-leave command. Defaults Not configured Command Modes INTERFACE VLAN-(conf-if-vl-n) Command History Version 7.6.1.0 Introduced on S-Series Version 7.5.1.0 Introduced on C-Series E-Series legacy command Usage Information Queriers normally send a certain number of queries when a leave message is received prior to deleting a group from the membership database. There may be situations in which fast deletion of a group is required. When IGMP fast leave processing is enabled, the switch will remove an interface from the multicast group as soon as it detects an IGMP version 2 leave message on the interface. ip igmp snooping flood c e s This command controls the flooding behavior of unregistered multicast data packets. On the E-Series, when flooding is enabled (the default), unregistered multicast data traffic is flooded to all ports in a VLAN. When flooding is disabled, unregistered multicast data traffic is forwarded to only multicast router ports, both static and dynamic, in a VLAN. If there is no multicast router port in a VLAN, then unregistered multicast data traffic is dropped. On the C-Series and S-Series, unregistered multicast data traffic is dropped when flooding is disabled; they do not forward the packets to multicast router ports. On the C-Series and S-Series, Layer 3 multicast must be disabled (no ip multicast-routing) in order to disable Layer 2 multicast flooding. Syntax ip igmp snooping flood Defaults Enabled Command Modes CONFIGURATION Command History Version 8.2.1.0 Version 7.7.1.1 Introduced on the C-Series and S-Series. Introduced on E-Series. Internet Group Management Protocol (IGMP) | 557