Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-107
bridge 1x1 slot/port restricted-tcn
Configures the restricted TCN status for a port or an aggregate of ports for the specified 1x1 mode VLAN
instance. When this parameter is enabled, the port will not propagate topology changes and notifications
to/from other ports.
bridge 1x1 vid {slot/port | logical_port} restricted-tcn {on | off | enable | disable}
Syntax Definitions
vid An existing VLAN ID number (1–4094).
slot/port Enter the slot number for the module and the physical port number on
that module (e.g., 3/1 specifies port 1 on slot 3).
logical_port Link aggregate ID number (0–31).
on Turns on (enables) the restricted TCN status for the specified
port-VLAN instance.
off Turns off (disables) the restricted TCN status for the specified
port-VLAN instance.
enable Enables the restricted TCN status for the specified port-VLAN instance.
disable Disables the restricted TCN status for the specified port-VLAN
instance.
Defaults
By default, the restricted TCN is set to disable.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• Enabling the restricted TCN status is used by network administrators to prevent bridges external to the
core region of the network from causing unnecessary MAC address flushing in that region.
• Note that enabling the restricted TCN status for a port may impact Spanning Tree connectivity.
• This command is an explicit Spanning Tree command that only applies to the specified VLAN instance
regardless of which operating mode (flat or 1x1) is active on the switch.
• If the switch is running in the flat mode when this command is used, the specified restricted TCN
status for the port is not active for the VLAN instance until the switch is running in the 1x1 Spanning
Tree mode.
• Note that when a configuration snapshot is taken of the switch, all Spanning Tree commands are saved
in their explicit format.
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