Bridge 1X1 Slot/Port Path Cost - Alcatel-Lucent OmniSwitch 6250 Cli Reference Manual

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bridge 1x1 slot/port path cost

Configures the Spanning Tree path cost value for a port or an aggregate of ports for the specified 1x1

mode VLAN instance. This value is the contribution of this port to the path cost towards the Spanning

Tree root bridge that includes this port. Path cost is a measure of the distance of the listed port from the

root bridge in the number of hops.

bridge 1x1 vid {slot/port | logical_port} path cost path_cost

Syntax Definitions

logical_port

By default, the path cost is set to zero.

Platforms Supported

OmniSwitch 6250

Usage Guidelines

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 path cost for the port

is not active for the specified VLAN instance until the operating mode for the switch is changed to the

Note that when the Spanning Tree protocol is changed to/from MSTP, the bridge priority and port path

cost values for the flat mode CIST instance are reset to their default values.

bridge path cost mode

active Spanning Tree protocol (16-bit for STP and RSTP, 32-bit for MSTP) or to use a 32-bit path cost

value regardless of which protocol is active.

Note that when a configuration snapshot is taken of the switch, all Spanning Tree commands are saved

in their explicit format.

If a 32-bit path cost value is in use and the path_cost is set to zero, the following IEEE 892.1S recom-

mended default path cost values based on link speed are used:

An existing VLAN ID number (1–4094).

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).

Link aggregate ID number (0–31).

Path cost value (0 - 65535 for 16-bit, 0–200000000 for 32-bit).

command to automatically select the path cost value based on the

OmniSwitch 6250 CLI Reference Guide

Distributed Spanning Tree Commands

November 2009