Huawei Quidway S6500 Series Operation Manual page 413

Operation Manual - STP
Quidway S6500 Series Ethernet Switches
You can configure the path cost of a port with either of the above-mentioned measures.
For more about the commands, refer to the Command Manual.
Upon the change of path cost of a port, MSTP will recalculate the port role and transit
the state. When instance-id takes 0, it indicates to set the path cost on the CIST.
By default, MSTP is responsible for calculating the port path cost.
III. Specify the standard to be followed in Path Cost calculation
The following two standards are currently available on the switch:
dot1d-1998: The switch calculates the default Path Cost of a port by the IEEE
802.1D-1998 standard.
dot1t: The switch calculates the default Path Cost of a port by the IEEE 802.1t
standard.
legacy: The switch calculates the default Path Cost of a port by the Huawei-3Com
standard.
You can specify the intended standard by using the following commands.
Perform the following configuration in system view.
Table 1-17 Specifying the standard to be followed in Path Cost calculation
Specify the standard to be adopted when
the switch calculates the default Path
Cost for the connected link
Restore the default standard to be used
By default, the switch calculates the default Path Cost of a port by the IEEE 802.1t
standard.
Table 1-18 Cost corresponding to the port speed of different standard.
Link speed
0
10Mb/s
Operation
dot1d-1998
Duplex state
value range
- 65535
Half-Duplex
Full-Duplex
100
Aggregated Link
99
2 Ports
95
Aggregated Link
95
3 Ports
95
Aggregated Link
4 Ports
Huawei Technologies Proprietary
1-21
Chapter 1 MSTP Region-configuration
Command
stp pathcost-standard { dot1d-1998 |
dot1t | legacy }
undo stp pathcost-standard
dot1t value
range
200,000,000
2,000,000
1,999,999
1,000,000
666,666
500,000
Huawei-3Co
m cost value
200,000
2,000
2,000
1,800
1,600
1,400