Bridge Msti Priority - Alcatel-Lucent OmniSwitch 6850-48 Cli Reference Manual

Alcatel-lucent omniswitch 6850-48: reference guide

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bridge msti priority

Configures the Spanning Tree priority value for a port or an aggregate of ports for the specified flat mode

Multiple Spanning Tree Instance (MSTI). The Spanning Tree algorithm uses the port priority value to

determine the most favorable port when a bridge has multiple ports with the same path cost to the root

bridge msti msti_id {slot/port | logical_port} priority priority

Syntax Definitions

logical_port

By default, the bridge port priority value is set to 7.

Platforms Supported

OmniSwitch 6400, 6850, 6850E, 6855, 9000E

Usage Guidelines

The port priority specifies the value of the priority field contained in the first byte of the Port ID. The

second byte contains the physical switch port number.

This command is an explicit Spanning Tree command that only applies to the specified MSTI regard-

less of which operating mode (flat or 1x1) is active on the switch. If MSTP is not the selected flat mode

protocol, however, the port priority value for any MSTI is not configurable in either mode.

Note that if zero is entered for the msti_id value, the specified priority value is applied to the CIST

instance. The flat mode CIST instance 0 is also known as MSTI 0.

The port priority value configured with this command is only applied to the specified MSTI. As a

result, a single port can have different priority values for each instance. For example, in flat mode, port

1/24 can have a priority value of 7 for MSTI 2 and a priority value of 5 for MSTI 3.

If the switch is running in 1x1 mode when this command is used, the specified priority value is not

active for the specified MSTI until the operating mode for the switch is changed to the flat mode.

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

in their explicit format.

An existing MSTI ID number (0–4094).

Enter the slot number for the module and the physical port number on

that module (for example, 3/1 specifies port 1 on slot 3).

Link aggregate ID number (0–31).

Port priority value (0–15). The lower the number, the higher the

Distributed Spanning Tree Commands

OmniSwitch CLI Reference Guide