Specifying The Igmp Leave-Query Type; Enabling Igmp Fast-Leave Processing - Cisco WS-C6506 Software Manual

Chapter 51 Configuring Multicast Services
This example shows how to specify the IGMP mode to IGMP-only and verify the configuration:
Console> (enable) set igmp mode igmp-only
IGMP mode set to igmp-only
Console> (enable) show igmp mode
IGMP Mode:
IGMP Operational Mode:
IGMP Address Aliasing Mode: normal
Console> (enable)

Specifying the IGMP Leave-Query Type

You can specify the IGMP leave-query type to be used when a port receives a leave message from a host.
When you specify a MAC-based general query, a leave query is sent for the exact GDA, and the version 1
or 2 hosts that have at least one membership for a group using that GDA will respond. When you specify
a general query, the reports from all version 1 and 2 hosts for all groups are registered. You can also
specify the auto mode. If you specify auto mode, a group-specific query is sent if there are no version 1
hosts in the network and a general query is sent if there are version 1 hosts in the network. A
group-specific query provides faster network convergence.
By default, a MAC-based general query is sent when a port receives a leave message.
To specify the leave-query type, perform this task in privileged mode:
Task
Step 1
Specify the IGMP leave-query type.
Step 2 Display the IGMP leave-query type.
This example shows how to set the IGMP leave-query type to a group-specific-query:
Console> (enable) set igmp leave-query-type auto-mode
IGMP Leave Query Type set to auto-mode
Console> (enable) show igmp leave-query-type
IGMP Leave Query Type : Group-Specific Query
Console> (enable)

Enabling IGMP Fast-Leave Processing

To enable IGMP fast-leave processing, perform this task in privileged mode:
Task
Step 1 Enable IGMP fast-leave processing on the switch. set igmp fastleave enable
Step 2 Verify that IGMP fast-leave processing is
enabled.
OL-8978-04
igmp-only
igmp-only
Command
set igmp leave-query-type auto-mode |
general-query | mac-gen-query
show igmp leave-query-type
Command
show multicast protocols status
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Configuring IGMP Snooping on the Switch
51-13