H3C Technologies H3C SecPath F1000-E - Manual (Page 49)

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With 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.
Thus, the leave latency is reduced on one hand, and the network bandwidth is saved on the other hand.
Configuring IGMP fast leave processing globally
Follow these steps to configure IGMP fast leave processing globally:
To do... Use the command... Remarks
Enter system view system-view —
Enter public network IGMP view igmp —
Configure IGMP fast leave
processing
fast-leave [ group-policy
acl-number ]
Required
Disabled by default
Configuring IGMP fast leave processing on an interface
Follow these steps to configure IGMP fast leave processing on an interface:
To do... Use the command... Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Configure IGMP fast leave
processing igmp fast-leave
[ group-policy acl-number ] Required
Disabled by default
CAUTION:
The IGMP fast leave processing configuration is effective only if the device is running IGMPv2 or IGMPv3.
Configuring IGMP SSM Mapping
Due to some possible restrictions, some receiver hosts on an SSM network may run IGMPv1 or IGMPv2.
To provide SSM service support for these receiver hosts, configure the IGMP mapping feature on the last
hop router.
Configuration Prerequisites
Before configuring the IGMP SSM mapping feature, complete the following tasks:
• Configure any unicast routing protocol so that all devices in the domain are interoperable at the
network layer.
• Configure basic functions of IGMP.
Enabling SSM Mapping
Follow these steps to enable the IGMP SSM mapping feature:
To do… Use the command… Remarks
Enter system view system-view —