Enabling The Fast Leave Feature; Disabling The Cgmp Fast Leave Feature - Cisco WS-C2950-24 Configuration Manual

Chapter 6 Configuring the System

Enabling the Fast Leave Feature

Command
Step 1
configure terminal
Step 2
cgmp leave-processing
Step 3
end
Step 4 show running-config

Disabling the CGMP Fast Leave Feature

Command
Step 1
configure terminal
Step 2
no cgmp leave-processing
Step 3 end
Step 4
show running-config
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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:
Purpose
Enter global configuration mode.
Enable CGMP and CGMP Fast Leave.
Return to privileged EXEC mode.
Verify your entry.
Beginning in privileged EXEC mode, follow these steps to disable the CGMP Fast
Leave feature:
Purpose
Enter global configuration mode.
Disable CGMP and CGMP Fast Leave.
Return to privileged EXEC mode.
Verify your entry.
Catalyst 2900 Series XL and Catalyst 3500 Series XL Software Configuration Guide
Controlling IP Multicast Packets through CGMP
6-47