H3C Technologies H3C S5120 Series Switches - Manual (Page 189)

1-24
The device can automatically calculate the default path cost; alternatively, you can also configure the
path cost for ports.
Make the following configurations on the leaf nodes only.
Specifying a standard that the device uses when calculating the default path cost
You can specify a standard for the device to use in automatic calculation for the default path cost. The
device supports the following standards:
z dot1d-1998 : The device calculates the default path cost for ports based on IEEE 802.1d-1998.
z dot1t : The device calculates the default path cost for ports based on IEEE 802.1t.
z legacy : The device calculates the default path cost for ports based on a private standard.
Follow these steps to specify a standard for the device to use when calculating the default path cost:
To do... Use the command... Remarks
Enter system view system-view —
Specify a standard for the
device to use when calculating
the default path costs of its
ports
stp pathcost-standard
{ dot1d-1998 | dot1t | legacy }
Optional
By default, the device
calculates the default path cost
for ports based on a private
standard.
Table 1-7 Link speed vs. path cost
Link speed Duplex state 802.1d-1998 802.1t Private standard
0 — 65535 200,000,000 200,000
10 Mbps
Single Port
Aggregate Link 2 Ports
Aggregate Link 3 Ports
Aggregate Link 4 Ports 100
100
100
100 2,000,000
1,000,000
666,666
500,000 2,000
1,800
1,600
1,400
100 Mbps
Single Port
Aggregate Link 2 Ports
Aggregate Link 3 Ports
Aggregate Link 4 Ports 19
19
19
19 200,000
100,000
66,666
50,000 200
180
160
140
1000 Mbps
Single Port
Aggregate Link 2 Ports
Aggregate Link 3 Ports
Aggregate Link 4 Ports 4
4
4
4 20,000
10,000
6,666
5,000 20
18
16
14
10 Gbps
Single Port
Aggregate Link 2 Ports
Aggregate Link 3 Ports
Aggregate Link 4 Ports 2
2
2
2 2,000
1,000
666
500 2
1
1
1