Alcatel-Lucent OmniSwitch 6250, Cli Reference Manual, Page: 541 / 2018

Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-101
bridge cist slot/port restricted-role
Configures whether or not to prevent a port (or an aggregate of ports) from becoming the root port. When
this parameter is enabled, the port will not become the root even if the port is the most likely candidate for
the root. Once another port is selected as the root port, the restricted port becomes the Alternate Port.
bridge cist {slot/port | logical_port} {restricted-role | root-guard} {on | off | enable | disable}
Syntax Definitions
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).
root-guard Optional command syntax. Enter root-guard instead of restricted-role ;
both parameters specify the same functionality for this command.
on Turns on (enables) the restricted role status for the specified port.
off Turns off (disables) the restricted role status for the specified port.
enable Enables the restricted role status for the specified port.
disable Disables the restricted role status for the specified port.
Defaults
By default, the port is not restricted from becoming the root port.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
•
When running in flat mode, this is a per-port setting and is applicable to any CIST or MSTI instances
configured on that port.
•
Note that preventing an eligible root port from becoming the root may impact connectivity within the
network.
•
Network administrators exclude certain ports from becoming the root to prevent bridges external to the
core region of the network from influencing the Spanning Tree topology.
•
Note that when a configuration snapshot is taken of the switch, all Spanning Tree commands are saved
in their explicit format.