H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches Chapter 2 IGMP Snooping Configuration
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2.4.5 Configuring Fast Leave Processing
The fast leave processing feature allows the switch to process IGMP leave group
messages in a fast way. With the fast leave processing feature enabled, when receiving
an IGMP leave group message on a port, the switch immediately removes that port
from the outgoing port list of the forwarding table entry for the indicated group. Then,
when receiving IGMP group-specific queries for that multicast group, the switch will not
forward them to that port.
In VLANs where only one host is attached to each port, fast leave processing helps
improve bandwidth and resource usage.
I. Configuring fast leave processing globally
Follow these steps to configure fast leave processing globally:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter IGMP Snooping
view
igmp-snooping
—
Enable fast leave
processing
fast-leave [ vlan vlan-list ]
Required
Disabled by default
II. Configuring fast leave processing on a port or a group of ports
Follow these steps to configure fast leave processing on a port or a group of ports:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter Ethernet
port view
interface interface-type
interface-number
Enter the
correspondin
g view
Enter port group
view
port-group { manual
port-group-name |
aggregation agg-id }
Required
Use either
command.
Enable fast leave processing
igmp-snooping
fast-leave [ vlan vlan-list ]
Required
Disabled by
default