Administrator Guide

Defaults Disabled.
Command Modes
● CONFIGURATION
● INTERFACE VLAN
Supported Modes Programmable-Mux (PMUX)
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Introduced on the M I/O Aggregator.
Usage
Information
To enable IGMP snooping, enter this command. When you enable this command from CONFIGURATION
mode, IGMP snooping enables on all VLAN interfaces (except the default VLAN).
NOTE: Execute the no shutdown command on the VLAN interface for IGMP Snooping to function.
ip igmp snooping fast-leave
Enable IGMP snooping fast-leave for this VLAN.
Syntax
ip igmp snooping fast-leave
To disable IGMP snooping fast leave, use the no igmp snooping fast-leave command.
Defaults Not configured.
Command Modes INTERFACE VLAN — (conf-if-vl-n)
Supported Modes Programmable-Mux (PMUX)
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Introduced on the M I/O Aggregator.
Usage
Information
Queriers normally send some queries when a leave message is received prior to deleting a group from the
membership database. There may be situations when you require a fast deletion of a group. When you
enable IGMP fast leave processing, the switch removes an interface from the multicast group as soon as
it detects an IGMP version 2 leave message on the interface.
ip igmp snooping flood
This command controls the flooding behavior of unregistered multicast data packets. When flooding is disabled, unregistered
multicast data traffic is forwarded to only multicast router ports in a VLAN. If there is no multicast router port in a VLAN,
unregistered multicast data traffic is dropped.
Syntax
ip igmp snooping flood
To disable the flooding, use the no ip igmp snooping flood command.
Parameters Enabled
Command Modes CONFIGURATION
Supported Modes All Modes
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
156 Internet Group Management Protocol (IGMP)