C613-50055-01 REV A Command Reference for x230 Series Edge Switches 467
AlliedWare Plus™ Operating System - Version 5.4.5-0.x
SPANNING TREE COMMANDS
SPANNING
-TREE MST INSTANCE RESTRICTED-TCN
spanning-tree mst instance restricted-tcn
Overview Use this command in Interface Configuration mode for a switch port interface only
to set the restricted TCN (Topology Change Notification) value to TRUE for the
specified MSTI (Multiple Spanning Tree Instance).
Use the no variant of this command in Interface Configuration mode to reset the
restricted TCN for the specified MSTI to the default value of FALSE.
Syntax
spanning-tree mst instance <instance-id> restricted-tcn
no spanning-tree mst instance <instance-id> restricted-tcn
Default The default value for restricted TCNs is FALSE, as reset with the no variant of this
command.
Mode Interface Configuration mode for a switch port interface only.
Usage A Topology Change Notification (TCN) is a simple Bridge Protocol Data Unit (BPDU)
that a bridge sends out to its root port to signal a topology change. You can
configure restricted TCN between TRUE and FALSE values with this command and
the no variant of this command.
If you configure restricted TCN to TRUE with this command then this stops the
switch port from propagating received topology change notifications and
topology changes to other switch ports.
If you configure restricted TCN to FALSE with the no variant of this command then
this enables the switch port to propagate received topology change notifications
and topology changes to other switch ports.
Examples
awplus# configure terminal
awplus(config)# interface port1.0.2
awplus(config-if)# spanning-tree mst instance 3 restricted-tcn
awplus# configure terminal
awplus(config)# interface port1.0.2
awplus(config-if)# no spanning-tree mst instance 3
restricted-tcn
Parameter Description
<instance-id> <1-15> Specify the MST instance ID. The MST instance must have
already been created using the instance vlan (MSTP) command.
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