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Fat AP and Cloud AP V200R010C00 Command Reference

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
stp pathcost-standard

stp pathcost-standard

Function

The stp pathcost-standard command sets the standard used to calculate the path cost.

The undo stp pathcost-standard command restores the default standard used to calculate the path cost.

By default, the 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 IEEE 802.1D standard that used to calculate the path cost. -
dot1t Indicates IEEE 802.1T standard that used to calculate the path cost. -
legacy Indicates Huawei legacy standard that used to calculate the path cost. -

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

A path cost is a port parameter, and is used by a spanning tree protocol to select a link. By calculating path costs, a spanning tree protocol selects stable links, blocks redundant paths, and trims a network into a loop-free network. The path cost range is determined by the path cost calculation standard.

Table 6-30 lists path costs defined by the IEEE 802.1D-1998 standard, IEEE 802.1T standard, and Huawei legacy standard. Different vendors use different standards.
Table 6-30  Path cost list

Interface Rate

Interface Mode

Recommended STP Path Cost

IEEE 802.1D-1998 Standard

IEEE 802.1T Standard

Huawei Legacy Standard

0

-

65535

200,000,000

200,000

10 Mbps

Half-Duplex

100

2,000,000

2000

Full-Duplex

99

1,999,999

1999

Aggregated Link 2 Ports

95

1,000,000

1800

Aggregated Link 3 Ports

95

666,666

1600

Aggregated Link 4 Ports

95

500,000

1400

100 Mbps

Half-Duplex

19

200,000

200

Full-Duplex

18

199,999

199

Aggregated Link 2 Ports

15

100,000

180

Aggregated Link 3 Ports

15

66,666

160

Aggregated Link 4 Ports

15

50,000

140

1000 Mbps

Full-Duplex

4

20,000

20

Aggregated Link 2 Ports

3

10,000

18

Aggregated Link 3 Ports

3

6666

16

Aggregated Link 4 Ports

3

5000

14

10 Gbps

Full-Duplex

2

2000

2

Aggregated Link 2 Ports

1

1000

1

Aggregated Link 3 Ports

1

666

1

Aggregated Link 4 Ports

1

500

1

Precautions

If the path cost calculation standard is changed on a port, the path cost of the port is restored to the default value. The stp cost command can be used to set a path cost for a port.

Usually, all switching devices on the same network use the same path cost calculation standard.

Example

# Use the IEEE 802.1d-1998 to calculate the path cost.

<Huawei> system-view
[Huawei] stp pathcost-standard dot1d-1998
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Updated: 2019-11-21

Document ID: EDOC1100064352

Views: 211510

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