H3C Technologies H3C S12500-X Series Switches - Manual (Page 33)

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Step Command Remarks
4. Configure the port as a static
router port. igmp-snooping static-router-port
vlan vlan-id By default, a port is not a static
router port.
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
Step 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
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate 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.