Cisco WS-C2950-24 User Manual

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Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
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Chapter 6 Configuring the System
Controlling IP Multicast Packets through CGMP
Enabling the Fast Leave Feature
The CGMP Fast Leave feature reduces the delay when group members leave
groups. When an end station requests to leave a CGMP group, the group remains
enabled for that VLAN until all members have requested to leave. With the Fast
Leave feature enabled, the switch immediately verifies if there are other group
members attached to its ports. If there are no other members, the switch removes
the port from the group. If there are no other ports in the group, the switch sends
a message to routers connected to the VLAN to delete the entire group.
The Fast Leave feature functions only if CGMP is enabled. The client must be
running IGMP version 2 for the Fast Leave feature to function properly.
Beginning in privileged EXEC mode, follow these steps to enable the CGMP Fast
Leave feature:
Disabling the CGMP Fast Leave Feature
Beginning in privileged EXEC mode, follow these steps to disable the CGMP Fast
Leave feature:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
cgmp leave-processing Enable CGMP and CGMP Fast Leave.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entry.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no cgmp leave-processing Disable CGMP and CGMP Fast Leave.
Step 3
end Return to privileged EXEC mode.
Step 4
show running-config Verify your entry.

Cisco WS-C2950-24 Specifications

General

Brand	Cisco
Model	WS-C2950-24
Category	Switch
Language	English