Deployment Guide

IGMP Snooping Commands
Dell Networking OS supports IGMP Snooping version 2 and 3 on all Dell Networking systems.
Important Points to Remember for IGMP Snooping
Dell Networking OS supports version 1, version 2, and version 3 hosts.
Dell Networking OS IGMP snooping implementation is based on IP multicast address (not based on Layer 2 multicast mac address) and
the IGMP snooping entries are in Layer 3 ow table not in Layer 2 forwarding information base (FIB).
Dell Networking OS IGMP snooping implementation is based on draft-ietf-magma-snoop-10.
Dell Networking OS supports IGMP snooping on JUMBO-enabled cards.
IGMP snooping is not enabled by default on the switch.
A maximum of 1800 groups and 600 VLAN are supported.
IGMP snooping is not supported on a default VLAN interface.
IGMP snooping is not supported over VLAN-Stack-enabled VLAN interfaces (you must disable IGMP snooping on a VLAN interface
before conguring VLAN-Stack-related commands).
clear ip igmp groups
Clear entries from the group cache table.
Syntax
clear ip igmp groups [group-address | interface]
Parameters
group-address (OPTIONAL) Enter the IP multicast group address in dotted decimal format.
interface (OPTIONAL) Enter the interface type and slot/port information: For a VLAN interface
enter the keyword vlan followed by a number from 1 to 4094.
Command Modes EXEC Privilege
Supported Modes All Modes
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
debug ip igmp
Enable debugging of IGMP packets.
Syntax
debug ip igmp [group address | interface]
To disable IGMP debugging, enter the no ip igmp command. To disable all debugging, enter the undebug all
command.
Defaults Disabled
514 Internet Group Management Protocol (IGMP)