Path Cost Configuration - H3C S7500 Series Operation Manual

Operation Manual – MSTP
H3C S7500 Series Ethernet Switches
1.3.2 MST Region Configuration
Refer to section
1.3.3 MSTP Operation Mode Configuration
Refer to section
1.3.4 Timeout Time Factor Configuration
Refer to section
1.3.5 Maximum Transmitting Speed Configuration
Refer to section
1.3.6 Edge Port Configuration
Refer to section

1.3.7 Path Cost Configuration

The path cost parameters reflects the link rates on ports. For a port on an
MSTP-enabled switch, the path cost may differ with MSTIs. You can enable flows of
different VLANs to travel along different physical links by configuring appropriate path
costs on ports, so that load balancing can be achieved by VLANs.
Path costs can be determined by switches 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 standard defined by private to calculate the default path costs
of ports.
Follow these steps to specify the standard for calculating path costs:
MST Region Configuration.
MSTP Operation Mode
Timeout Time Factor Configuration.
Maximum Transmitting Speed
Edge Port Configuration.
1-25
Chapter 1 MSTP Configuration
Configuration.
Configuration.