HP 6125XLG R2306-HP 6125XLG Blade Switch IP Multicast Configuration Guide - Page 62
Configuring a multicast group filter, Adjusting IGMP performance, Enabling IGMP fast-leave processing
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Step 1. Enter system view. 2. Enter interface view. 3. Configure the interface as a static member interface. Command system-view interface interface-type interface-number igmp static-group group-address [ source source-address ] Remarks N/A N/A An interface is not a static member of any multicast group or multicast source and group by default. Configuring a multicast group filter To restrict the hosts on the network attached to an interface from joining certain multicast groups, you can specify an ACL on the interface as a packet filter so that the interface maintains only the multicast groups that match the ACL. To configure a multicast group filter: Step 1. Enter system view. 2. Enter interface view. Command system-view interface interface-type interface-number 3. Configure a multicast group filter. igmp group-policy acl-number [ version-number ] Remarks N/A N/A By default, no multicast group filter is configured on any interface. Hosts attached to an interface can join any multicast group. NOTE: If you configure the interface as a static member interface for a multicast group or a multicast source and group, this configuration is not effective for the multicast group or the multicast source and group. Adjusting IGMP performance Before adjusting IGMP performance, complete the following tasks: • Configure any unicast routing protocol so that all devices are interoperable at the network layer. • Configure basic IGMP functions. Enabling IGMP fast-leave processing In some applications, such as ADSL dial-up networking, only one multicast receiver host is attached to an interface of the IGMP querier. To allow fast response to the leave messages of the host when it switches frequently from one multicast group to another, you can enable fast-leave processing on the IGMP querier. With IGMP fast-leave processing enabled, after receiving an IGMP leave message from a host, the IGMP querier directly sends a leave notification to the upstream without sending IGMP group-specific queries or IGMP group-and-source-specific queries. This reduces leave latency and preserves the network bandwidth. 55