Deployment Guide

Internet Group Management Protocol (IGMP) | 573
ip igmp snooping enable
c e s
Enable IGMP snooping on all or a single VLAN. This is the master on/off switch to enable IGMP
snooping.
Syntax
ip igmp snooping enable
To disable IGMP snooping, enter no ip igmp snooping enable command.
Defaults
Disabled
Command Modes
CONFIGURATION
INTERFACE VLAN
Command
History
Usage
Information
You must enter this command to enable IGMP snooping. When enabled from CONFIGURATION
mode, IGMP snooping is enabled on all VLAN interfaces (except default VLAN).
Related
Commands
ip igmp snooping fast-leave
c e s
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)
Command
History
Usage
Information
Queriers normally send a certain number of queries when a leave message is received prior to deleting
a group from the membership database. There may be situations in which fast deletion of a group is
required. When IGMP fast leave processing is enabled, the switch will remove an interface from the
multicast group as soon as it detects an IGMP version 2 leave message on the interface.
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
E-Series legacy command
Note: You must execute the no shutdown command on the VLAN interface for IGMP
Snooping to function.
no shutdown Activate an interface
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
E-Series legacy command