IGMP Immediate-leave

For a network with only one host connected IGMP can be configured to minimise the leave latency with the “ip igmp immediate-leave group-list <ACL>” command.

R2(config)#access-list 10 permit
R2(config)#int f0/1
R2(config-if)#ip igm immediate-leave group-list 10

This configures f0/1 interface to  immediately stop forwarding a multicast group if it is  match by ACL 10 (the entire multicast range in this case) once a IMGP v2 group leave message for the group is received. The normal process would be to send a or a number queries (based on the configuration of “ip igmp last-member-query-count“) and will wait for a time out value to expire (specified by “ip igmp last-member-query-interval“) before stopping forwarding.

About ccie4all
Hello, and welcome to the first post of my CCIE blog This blog has got one simple goal and that is to improve our skills in Cisco Networking field so we can become best engineers on a job market. Wordpress Blog https://ccie4all.wordpress.com/ information about the changes made to Gns3 BGP , MPLS and R&S CCIE labs. In order to access and download all provided materials and receive important updates from Gns3 BGP , MPLS and R&S CCIE labs under GNS3 tab in the main header please go ahead and subscribe to https://ccie4all.wordpress.com/ ! All other posts have not been affected and can be accessed at any given time. Enjoy ! Tom

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