Configuring A Port As An Edge Port; Configuring The Path Cost For A Port - H3C S5100-SI Series Operation Manual

Operation Manual – MSTP
H3C S5100-SI/EI Series Ethernet Switches

1.4.6 Configuring a Port as an Edge Port

Refer to

1.4.7 Configuring the Path Cost for a Port

The path cost parameter reflects the rate of the link connected to the port. For a port on
an MSTP-enabled switch, the path cost may be different in different MSTIs. You can
enable flows of different VLANs to travel along different physical links by configuring
appropriate path costs on ports, so that VLAN-based load balancing can be
implemented.
Path cost of a port can be determined by the switch or through manual configuration.
I. Standards for calculating path costs of ports
Currently, a switch can calculate the path costs of ports based on one of the following
standards:
dot1d-1998: Adopts the IEEE 802.1D-1998 standard to calculate the default path
costs of ports.
dot1t: Adopts the IEEE 802.1t standard to calculate the default path costs of ports.
legacy: Adopts the proprietary standard to calculate the default path costs of
ports.
Follow these steps to specify the standard for calculating path costs:
Enter system view
Specify the standard for
calculating the default
path costs of the links
connected to the ports of
the switch
Table 1-7 Transmission rates vs. path costs
Rate
0
10 Mbps
Configuring the Current Port as an Edge
To do...
system-view
stp pathcost-standard
{ dot1d-1998 | dot1t |
legacy }
Operation mode
(half-/full-duplex)
—
Half-duplex/Full-duplex
Aggregated link 2 ports
Aggregated link 3 ports
Aggregated link 4 ports
Port.
Use the command...
802.1D-1998
65,535
100
95
95
95
1-37
Chapter 1 MSTP Configuration
Remarks
—
Optional
By default, the legacy
standard is used to
calculate the default path
costs of ports.
Latency
IEEE 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