stp bridge-diameter (MSTP process view)

Function

The stp bridge-diameter command configures a network diameter for a spanning tree in specified MSTP process.

The undo stp bridge-diameter command restores the default network diameter in specified MSTP process.

By default, the network diameter of a spanning tree is 7.

Format

stp bridge-diameter diameter

undo stp bridge-diameter

Parameters

Parameter	Description	Value
diameter	Specifies a network diameter.	The value is an integer ranging from 2 to 7.

Parameter

Description

Value

diameter

Specifies a network diameter.

The value is an integer ranging from 2 to 7.

Views

MSTP process view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mstp	write

Usage Guidelines

Usage Scenario

On a network running STP, the network diameter is the maximum number of devices between two devices. An improper network diameter may slow down network convergence and affect user communication.
You can run the stp bridge-diameter command to set a proper network diameter based on the network scale. This helps accelerate network convergence.
The following time parameters are related to the network scale:
Hello Time
Forward Delay
Max Age

Configuration Impact

The device will automatically set proper values for Hello Time, Forward Delay, and Max Age based on the configured network diameter.

Precautions

After a network diameter is configured, ForwardDelay and Max Age values are recorded in the configuration file, but the bridge-diameter value is not recorded in the configuration file. For an MSTP network, the network diameter configured using the stp bridge-diameter command takes effect only for the CIST.

Example

# Set the MSTP process 1's network diameter to 5.

<HUAWEI> system-view
[~HUAWEI] stp process 1
[*HUAWEI-mst-process-1] stp bridge-diameter 5