Cisco Catalyst 2960 Series User Manual

immediately sends general queries, which expedite the process of recovering from the flood mode during the
TCN event. Leaves are always sent if the switch is the spanning-tree root regardless of this configuration.
Follow these steps to enable sending of leave messages:
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
ip igmp snooping tcn query solicit
4.
end
5.
show ip igmp snooping
6.
copy running-config startup-config
DETAILED STEPS
PurposeCommand or Action
Enables privileged EXEC mode. Enter your password if
prompted.
enable
Example:
Switch> enable
Step 1
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 2
Sends an IGMP leave message (global leave) to speed the
process of recovering from the flood mode caused during a
TCN event. By default, query solicitation is disabled.
ip igmp snooping tcn query solicit
Example:
Switch(config)# ip igmp snooping tcn query
Step 3
To return to the default query solicitation, use the no
ip igmp snooping tcn query solicit global
configuration command.
Note
solicit
Returns to privileged EXEC mode.end
Example:
Switch(config)# end
Step 4
Verifies the TCN settings.show ip igmp snooping
Example:
Switch# show ip igmp snooping
Step 5
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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How to Configure IGMP Snooping and MVR

Cisco Catalyst 2960 Series Specifications

General

Layer	Layer 2
Power over Ethernet (PoE)	Available on some models
RAM	128 MB
Flash Memory	32 MB
MAC Address Table Size	8000
Operating Temperature	0°C to 45°C (32 to 113°F)
Ports	24 or 48 x 10/100/1000