Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 765)

IGMP Snooping Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 31.27
ip igmp snooping tcn query solicit
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 switch, unless the
switch is the Master Node in an EPSR ring, or is the Root Bridge in a Spanning Tree.
When the switch is the Master Node in an EPSR ring, or the switch 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 VLANs using this command from the Interface
Configuration mode. Select the VLAN you want to disable in Interface Configuration mode
then issue the no variant of this command to disable the specified VLAN without disabling
this feature for other VLANs.
Mode Global Configuration and Interface Configuration for a VLAN interface.
Usage Once enabled, if the switch is not an IGMP Querier, on detecting a topology change, the
switch generates IGMP Query Solicit messages that are sent to all the ports of the vlan
configured for IGMP Snooping on the switch.
On a switch 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 switch that detects a topology change is an IGMP Querier then the switch 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 switch that is the Master Node in an EPSR ring or on a switch that is a Root
Bridge in a Spanning Tree. Query Solicitation is not disabled for the switch these instances.
However, Query Solicitation can be disabled on a per-vlan basis from the Interface
Configuration mode.
See the below state table that shows when Query Solicit messages are sent in these
instances:
See “Query Solicitation” on page 30.8 for introductory information about the Query
Solicitation feature.
Command
issued from
Global
Configuration
Switch is STP Root
Bridge or the
EPSR Master Node Command issued
from Interface
Configuration
IGMP Query Solicit
message sent on VLAN
No Yes Yes Yes
Yes Yes No No
Yes Yes Yes Yes