Cisco Catalyst 2950 Command Reference

2-356
Catalyst 2950 and Catalyst 2955 Switch Command Reference
0L-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
show ip igmp snooping
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. Use the mrouter keyword to display
the dynamically learned and manually configured multicast router ports.
show ip igmp snooping [group | mrouter | querier] [vlan vlan-id] [ | {begin | exclude | include}
expression]
Syntax Description
Command Modes User EXEC
Command History
Usage Guidelines Use this command to display snooping characteristics for the switch or for a specific VLAN.
You can also use the show mac address-table multicast privileged EXEC command to display entries
in the MAC address table for a VLAN that has IGMP snooping enabled.
When multicast VLAN registration (MVR) is enabled, use the show ip igmp snooping mrouter
command to display the IGMP snooping dynamically learned and manually configured multicast router
ports.
Use the group keyword to display the multicast groups, the compatibility mode, and the ports that are
associated with each group.
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 command output also shows
the VLAN and interface on which the querier was detected. If the querier is a multicast router, the output
shows the Port field as Router.
group (Optional) Display information about the IGMP multicast groups, the compatibility
mode, and the ports that are associated with each group.
mrouter (Optional) Display the IGMP snooping dynamically learned and manually configured
multicast router ports.
querier (Optional) Display information about the IGMP version that an interface supports.
vlan vlan-id (Optional) Keyword and variable to specify a VLAN. The range is 1 to 4094. This
keyword is available only in privileged EXEC mode.
| begin (Optional) Display begins with the line that matches the specified expression.
| exclude (Optional) Display excludes lines that match the specified expression.
| include (Optional) Display includes lines that match the specified expression.
expression Expression in the output to use as a reference point.
Release Modification
12.0(5.2)WC(1) This command was introduced.
12.1(19)EA1 The group and querier keywords were added.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz