Configuring Path Costs Of Ports - H3C S5500-EI series Operation Manual

Operation Manual – MSTP
H3C S5500-EI Series Ethernet Switches
1.4.5 Configuring Ports as Edge Ports
Refer to

1.4.6 Configuring Path Costs of Ports

Path cost is a parameter related to the rate of port-connected links. On an
MSTP-compliant device, ports can have different priorities in different MST instances.
Setting an appropriate path cost allows VLAN traffic flows to be forwarded along
different physical links, thus to enable per-VLAN load balancing.
The device can automatically calculate the default path cost; alternatively, you can also
configure the path cost for ports.
I. 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:
dot1d-1998: The device calculates the default path cost for ports based on IEEE
802.1d-1998.
dot1t: The device calculates the default path cost for ports based on IEEE 802.1t.
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:
Enter system view
Specify a standard for the
device to use when
calculating the default
path cost of the link
connected with the device
Table 1-7 Link speed vs. path cost
Link speed
0
10 Mbps
Configuring Ports as Edge Ports
To do...
Duplex state
—
Single Port
Aggregated Link 2 Ports
Aggregated Link 3 Ports
Aggregated Link 4 Ports
in the section about root bridge configuration.
Use the command...
system-view
stp pathcost-standard
{ dot1d-1998 | dot1t |
legacy }
802.1d-1998
65535
100
100
100
100
1-36
Chapter 1 MSTP Configuration
Remarks
—
Optional
legacy by default
Private
802.1t
standard
200,000,000 200,000
2,000,000 2,000
1,000,000 1,800
666,666 1,600
500,000 1,400