C613-50100-01 REV C Command Reference for x930 Series 1619
AlliedWare Plus™ Operating System - Version 5.4.6-1.x
IGMP AND IGMP SNOOPING COMMANDS
IP
IGMP SNOOPING TCN QUERY SOLICIT
ip igmp snooping tcn query solicit
Overview Use this command to enable IGMP (Internet Group Management Protocol)
Snooping TCN (Topology Change Notification) Query Solicitation feature. When
this command is used in the Global Configuration mode, Query Solicitation is
enabled.
Use the no variant of this command to disable IGMP Snooping TCN Query
Solicitation. When the no variant of this command is used in Interface
Configuration mode, this overrides the Global Configuration mode setting and
Query Solicitation is disabled.
Syntax
ip igmp snooping tcn query solicit
no ip igmp snooping tcn query solicit
Default IGMP Snooping TCN Query Solicitation is disabled by default on the device, unless
the device is the Master Node in an EPSR ring, or is the Root Bridge in a Spanning
Tree.
When the device is the Master Node in an EPSR ring, or the device is the Root
Bridge in a Spanning Tree, then IGMP Snooping TCN Query Solicitation is enabled
by default and cannot be disabled using the Global Configuration mode
command. However, Query Solicitation can be disabled for specified interfaces
using the no variant of this command from the Interface Configuration mode.
Mode Global Configuration, and Interface Configuration for a VLAN interface.
Usage Once enabled, if the device is not an IGMP Querier, on detecting a topology
change, the device generates IGMP Query Solicit messages that are sent to all the
ports of the vlan configured for IGMP Snooping on the device.
On a device that is not the Master Node in an EPSR ring or the Root Bridge in a
Spanning Tree, Query Solicitation can be disabled using the no variant of this
command after being enabled.
If the device that detects a topology change is an IGMP Querier then the device will
generate an IGMP Query message.
Note that the no variant of this command when issued in Global Configuration
mode has no effect on a device that is the Master Node in an EPSR ring or on a
device that is a Root Bridge in a Spanning Tree. Query Solicitation is not disabled
for the device these instances. However, Query Solicitation can be disabled on a
per-vlan basis from the Interface Configuration mode.
See the following state table that shows when Query Solicit messages are sent in
these instances:
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