Addendum
• When enabled, IGMP snooping Querier does not start if there is a statically configured multicast
router interface in the VLAN.
• When enabled, IGMP snooping Querier starts after one query interval in case no IGMP general query
(with IP SA lower than its VLAN IP address) is received on any of its VLAN members.
• When enabled, IGMP snooping Querier periodically sends general queries with an IP source address
of the VLAN interface. If it receives a general query on any of its VLAN member, it checks the IP
source address of the incoming frame.
If the IP SA in the incoming IGMP general query frame is lower than the IP address of the VLAN
interface, the switch disables its IGMP snooping Querier functionality.
If the IP SA of the incoming IGMP general query is higher than the VLAN IP address, the switch
continues to work as an IGMP snooping Querier.
ip igmp snooping enable
Enable IGMP snooping on all or a single VLAN. This command is the master on/off switch to enable IGMP
snooping.
Z9000 S4810 S4820TS6000
Syntax
ip igmp snooping enable
To disable IGMP snooping, use the no ip igmp snooping enable command.
Defaults Disabled.
Command
Modes
• CONFIGURATION
• INTERFACE VLAN
Command
History
This guide is platform-specific. For command information about other platforms,
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version 9.2(0.0) Introduced on the M I/O Aggregator. This command is
supported in Programmable-Mux (PMUX) mode only.
Version 9.0.2.0 Introduced on the S6000.
Version
8.3.19.0
Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
E-Series legacy
command
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).
Internet Group Management Protocol (IGMP)
357