Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module FTOS Command Line Referen - Page 228

www.dell.com | support.dell.com Important Points to Remember for IGMP Querier • The IGMP snooping Querier supports version 2. • You must configure an IP address to the VLAN interface for IGMP snooping Querier to begin. The IGMP snooping Querier disables itself when a VLAN IP address is cleared, and then it restarts itself when an IP address is re-assigned to the VLAN interface. • When enabled, IGMP snooping Querier will not start if there is a statically configured multicast router interface in the VLAN. • When enabled, IGMP snooping Querier starts after one query interval in case no IGMP general query (with IP SA lower than its VLAN IP address) is received on any of its VLAN members. • When enabled, IGMP snooping Querier periodically sends general queries with an IP source address of the VLAN interface. If it receives a general query on any of its VLAN member, it will check the IP source address of the incoming frame. • If the IP SA in the incoming IGMP general query frame is lower than the IP address of the VLAN interface, then the switch disables its IGMP snooping Querier functionality. • If the IP SA of the incoming IGMP general query is higher than the VLAN IP address, the switch will continue to work as an IGMP snooping Querier. ip igmp access-group Use this feature to specify access control for packets. Syntax ip igmp access-group access-list To remove the feature, use the no ip igmp access-group access-list command. Parameters access-list Enter the name of the extended ACL (16 characters maximum). Defaults Not configured Command Modes INTERFACE (conf-if-interface-slot/port) Command History Usage Information Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module The access list accepted is an extended ACL. This feature is used to block IGMP reports from hosts, on a per-interface basis; based on the group address and source address specified in the access list. ip igmp group-join-limit Use this feature to limit the number of IGMP groups that can be joined in a second. Syntax ip igmp group-join-limit number Parameters number Enter the number of IGMP groups permitted to join in a second. Range: 1 to 10000 Defaults none Command Modes CONFIGURATION (conf-if-interface-slot/port) 228 | Internet Group Management Protocol (IGMP)