Name: Cisco Catalyst 3850 series
Brand: Cisco
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PurposeCommand or Action

Disabling Multicast Flooding During a TCN Event (CLI)

When the device receives a TCN, multicast traffic is flooded to all the ports until 2 general queries are received.

If the device has many ports with attached hosts that are subscribed to different multicast groups, this flooding

might exceed the capacity of the link and cause packet loss. Follow these steps to control TCN flooding:

SUMMARY STEPS

enable

configure terminal

interface interface-id

no ip igmp snooping tcn flood

end

show ip igmp snooping

copy running-config startup-config

DETAILED STEPS

PurposeCommand or Action

Enables privileged EXEC mode. Enter your password if

prompted.

enable

Example:

Device> enable

Step 1

Enters the global configuration mode.configure terminal

Example:

Device# configure terminal

Step 2

Specifies the interface to be configured, and enters interface

configuration mode.

interface interface-id

Example:

Device(config)# interface gigabitethernet

Step 3

1/0/1

IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E (Catalyst 3850 Switches)

86 OL-32598-01

Configuring IGMP

How to Configure IGMP Snooping

Questions and Answers:

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Cisco Catalyst 3850 series Specifications

General