4000 Router Series IP Multicast Configuration Guide

ManualsBrandsHP ManualsNetwork HardwareHP MSR3024 TAA-compliant AC Router

Enabling IGMP snooping fast-leave processing

The IGMP snooping fast-leave processing feature enables the switch to process IGMP leave messages

quickly. When a port that is enabled with the IGMP snooping fast-leave processing feature receives an

IGMP leave message, the switch immediately removes that port from the forwarding entry for the

multicast group specified in the message. Then, when the switch receives IGMP group-specific queries for

that multicast group, it does not forward them to that port.

When you enable the IGMP snooping fast-leave processing feature, follow these guidelines:

• In a VLAN, you can enable IGMP snooping fast-leave processing on ports that have only one

receiver host attached. If a port has multiple hosts attached, do not enable IGMP snooping

fast-leave processing on this port. Otherwise, other receiver hosts attached to this port in the same

multicast group cannot receive the multicast data destined to this group.

• You can enable IGMP snooping fast-leave processing either for the current port in proper interface

view or globally for all ports in IGMP-snooping view. If the configurations are made both in

interface view and IGMP-snooping view, the configuration made in interface view takes priority.

Enabling IGMP snooping fast-leave processing globally

Ste

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter IGMP-snooping view.

igmp-snooping N/A

3. Enable IGMP snooping

fast-leave processing globally.

fast-leave [ vlan vlan-list ]

By default, fast-leave processing is

disabled.

Enabling IGMP snooping fast-leave processing on a port

Ste

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter Layer 2 Ethernet

interface view.

interface interface-type

interface-number

N/A

3. Enable IGMP snooping

fast-leave processing on the

port.

igmp-snooping fast-leave [ vlan

vlan-list ]

By default, fast-leave processing is

disabled.

Configuring IGMP snooping policies

Before you configure IGMP snooping policies, complete the following tasks:

• Enable IGMP snooping for the VLAN.

• Determine the ACL used as the multicast group filter.

• Determine the maximum number of multicast groups that a port can join.

Configuring a multicast group filter

When you configure a multicast group filter, follow these guidelines: