stp pathcost-standard (MSTP process view)

Function

The stp pathcost-standard command sets a standard for calculating the path cost in MSTP process.

The undo stp pathcost-standard command restores the default standard for calculating the path cost in MSTP process.

By default, IEEE 802.1T is used to calculate the path cost.

Format

stp pathcost-standard { dot1d-1998 | dot1t | legacy }

undo stp pathcost-standard

Parameters

Parameter	Description	Value
dot1d-1998	Indicates that IEEE 802.1D is used to calculate the path cost.	-
dot1t	Indicates that IEEE 802.1T is used to calculate the path cost.	-
legacy	Indicates that the Huawei legacy standard is used to calculate the path cost.	-

Parameter

Description

Value

dot1d-1998

Indicates that IEEE 802.1D is used to calculate the path cost.

dot1t

Indicates that IEEE 802.1T is used to calculate the path cost.

legacy

Indicates that the Huawei legacy standard is used to calculate the path cost.

Views

MSTP process view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mstp	write

Usage Guidelines

Usage Scenario

Path costs are used as a reference for a spanning tree protocol to select stable links, block redundant paths, and trim a network into a loop-free network. Path costs vary with path cost calculation standards. To set a standard for calculating the path cost, run the stp pathcost-standard command.

Configuration Impact

If the path cost calculation standard is changed on a port, the path cost of the port is restored to the default value. To set a path cost for a port, run the stp cost command.

Precautions

Generally, all devices on the same network should use the same path cost calculation standard.
After STP is enabled on a PW interface, the cost of the PW interface is fixed: dot1d-1998=3, dot1t=4657, and legacy=13.

Example

# Use IEEE 802.1D to calculate the MSTP process 1's path cost.

<HUAWEI> system-view
[~HUAWEI] stp process 1
[*HUAWEI-mst-process-1] stp pathcost-standard dot1d-1998