Users Guide

• 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.
clear ip igmp snooping groups
Clear snooping entries from the group cache table.
Syntax
clear ip igmp snooping groups [group-address interface | interface]
Parameters
group-address (OPTIONAL) Enter the IP multicast group address in dotted decimal format.
interface interface Enter the following keywords and slot/port or number information:
• For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet
then the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
•
For a port channel interface, enter the keywords port-channel then a
number.
Command Modes EXEC
Command History
This guide is platform-specic. 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 Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on S-Series and Z–Series.
Usage Information IGMP commands accept only non-VLAN interfaces — specifying VLAN does not yield results.
debug ip igmp snooping
Enable debugging of IGMP snooping packets on interfaces and groups.
Syntax
debug ip igmp snooping [group address | interface]
• To disable debugging of IGMP snooping, use the no debug ip igmp snooping [group
address | interface] command.
• To disable all debugging, use the undebug all command.
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Internet Group Management Protocol (IGMP)