Show Ip Igmp Snooping - Cisco Catalyst 3750 Command Reference Manual

Chapter 2 Catalyst 3750 Switch Cisco IOS Commands

show ip igmp snooping

Use the show ip igmp snooping user EXEC command to display the Internet Group Management
Protocol (IGMP) snooping configuration of the switch or the VLAN.
Syntax Description groups
mrouter
querier
vlan vlan-id
| begin
| exclude
| include
expression
Command Modes User EXEC
The vlan vlan-id keyword is available only in privileged EXEC mode.
Command History Release
12.1(11)AX
12.1(19)EA1
12.2(18)SE
Usage Guidelines Use this command to display snooping configuration for the switch or for a specific VLAN.
Although visible in the output display, output lines for topology change notification (TCN) and
source-only learning are not valid.
Use the show ip igmp snooping querier command to display the IGMP version and IP address of a
detected device that sends IGMP query messages, also called a querier. A subnet can have multiple
multicast routers but has only one IGMP querier. In a subnet running IGMPv2, one of the multicast
routers is elected as the querier. The querier can be a Layer 3 switch.
The show ip igmp snooping querier command output also shows the VLAN and interface on which the
querier was detected. If the querier is the switch, the output shows the Port field as Router. If the querier
is a router, the output shows the port number on which the querier is learned in the Port field.
Expressions are case sensitive. For example, if you enter | exclude output, the lines that contain output
do not appear, but the lines that contain Output appear.
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show ip igmp snooping [groups | mrouter | querier] [vlan vlan-id] [ | {begin | exclude | include}
expression]
(Optional) See the
(Optional) See the
(Optional) Display information about the IGMP version that an interface
supports.
(Optional) Specify a VLAN; the range is 1 to 4094 (available only in
privileged EXEC mode).
(Optional) Display begins with the line that matches the expression.
(Optional) Display excludes lines that match the expression.
(Optional) Display includes lines that match the specified expression.
Expression in the output to use as a reference point.
Modification
This command was introduced.
The querier keyword was added.
The groups keyword was added. The show ip igmp snooping groups
command replaced the show ip igmp snooping multicast command.
show ip igmp snooping groups
show ip igmp snooping mrouter
Catalyst 3750 Switch Command Reference
show ip igmp snooping
command.
command.
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