Enabling Igmp Fast Leave; Configuring Igmp Snooping Filtering Acls - H3C S7500 Series Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches

3.2.3 Enabling IGMP Fast Leave

Normally, when receiving an IGMP Leave message, the IGMP Snooping-enabled
switch does not immediately remove the port from the multicast group, but sends an
IGMP group-specific query message. If no response is received in a given period, it
then removes the port from the multicast group.
If the IGMP fast leave feature is enabled, when receiving an IGMP Leave message, the
IGMP Snooping-enabled switch immediately removes the port from the multicast group.
When a port has only one user, enabling the IGMP fast leave feature on the port can
save bandwidth.
I. Enable the IGMP fast leave feature for all ports globally
Follow these steps to enable the IGMP fast leave feature for all ports globally:
Enter system view
Enable the fast leave
feature from the multicast
group of the specific
VLAN for all port
II. Enable the fast leave feature for a port
Follow these steps to enable the fast leave feature for a port:
Enter system view
Enter Ethernet port view
Enable the port to fast
leave from the multicast
group(s) of the specific
VLAN(s)

3.2.4 Configuring IGMP Snooping Filtering ACLs

You can configure multicast filtering ACLs on the switch ports connected to users so as
to use the IGMP Snooping filtering feature to limit the multicast streams that the users
can access. With this feature, you can treat different VoD users in different ways by
allowing them to access the multicast streams in different multicast groups.
In practice, when a user orders a multicast program, an IGMP report message is
generated. When the message is received on a switch, the switch checks the multicast
To do... Use the command...
system-view
igmp-snooping
fast-leave [ vlan
vlan-list ]
To do...
system-view
interface interface-type
interface-number
igmp-snooping
fast-leave [ vlan vlan-list ]
Chapter 3 IGMP Snooping Configuration
Use the command...
3-8
Remarks
—
Optional
By default, the fast leave
feature from a multicast group
for all ports is disabled.
Remarks
—
—
Optional
By default, the fast leave
feature is disabled.