EasyManuals Logo

Cisco CATALYST 2960 Command Reference Guide

Cisco CATALYST 2960
800 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #181 background imageLoading...
Page #181 background image
2-155
Catalyst 2960 Switch Command Reference
OL-8604-03
Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
ip igmp snooping tcn flood
ip igmp snooping tcn flood
Use the ip igmp snooping tcn flood interface configuration command to specify multicast flooding as
the Internet Group Management Protocol (IGMP) snooping spanning-tree Topology Change Notification
(TCN) behavior. Use the no form of this command to disable the multicast flooding.
ip igmp snooping tcn flood
no ip igmp snooping tcn flood
Syntax Description This command has no arguments or keywords.
Defaults Multicast flooding is enabled on an interface during a spanning-tree TCN event.
Command Modes Interface configuration
Command History
Usage Guidelines When the switch receives a TCN, multicast traffic is flooded to all the ports until two general queries are
received. If the switch has many ports with attached hosts that are subscribed to different multicast
groups, the flooding might exceed the capacity of the link and cause packet loss.
You can change the flooding query count by using the ip igmp snooping tcn flood query count count
global configuration command.
Examples This example shows how to disable the multicast flooding on an interface:
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# no ip igmp snooping tcn flood
You can verify your settings by entering the show ip igmp snooping privileged EXEC command.
Related Commands
Release Modification
12.2(25)FX This command was introduced.
Command Description
ip igmp snooping Enables IGMP snooping on the switch or on a VLAN.
ip igmp snooping tcn Configures the IGMP TCN behavior on the switch.
show ip igmp snooping Displays the IGMP snooping configuration of the switch or the VLAN.

Table of Contents

Other manuals for Cisco CATALYST 2960

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Cisco CATALYST 2960 and is the answer not in the manual?

Cisco CATALYST 2960 Specifications

General IconGeneral
ManageableYes
StackingNo
ModelCatalyst 2960 Series Switches
Power over Ethernet (PoE)Available on some models (IEEE 802.3af)
VLANs255 active VLANs
FeaturesQoS
Operating Temperature32 to 113°F (0 to 45°C)
Relative Humidity10% to 85% non-condensing
Power ConsumptionVaries by model (30W to 400W)

Related product manuals