H3C Technologies H3C S3100 Series Switches - Manual (Page 205)

Operation Manual – MSTP
H3C S3100-52P Ethernet Switch
Chapter 1 MSTP Configuration
1-30
II. Configure the path costs of ports
Table 1-24 Configure the path cost for specified ports in system view
Operation Command Description
Enter system view system-view —
Configure the path cost
for specified ports
stp interface
interface-list [ instance
instance-id ] cost cost
Required
An MSTP-enabled switch
can calculate path costs
for all its ports
automatically.
Table 1-25 Configure the path cost for a port in Ethernet port view
Operation Command Description
Enter system view system-view —
Enter Ethernet port view
interface interface-type
interface-number
—
Configure the path cost
for the port stp [ instance
instance-id ] cost cost
Required
A MSTP-enabled switch
can calculate path costs
for all its ports
automatically.
Changing the path cost of a port may change the role of the port and put it in state
transition. Executing the stp cost command with the instance-id argument being 0 sets
the path cost on the CIST for the port.
III. Configuration example (A)
# Configure the path cost of Ethernet1/0/1 in spanning tree instance 1 to be 2,000.
1) Perform this configuration in system view.
system-view
[H3C] stp interface ethernet1/0/1 instance 1 cost 2000
2) Perform this configuration in Ethernet port view.
system-view
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] stp instance 1 cost 2000
IV. Configuration example (B)
# Configure the path cost of Ethernet1/0/1 in spanning tree instance 1 to be calculated
by the MSTP-enabled switch according to the IEEE 802.1D-1998 standard.
1) Perform this configuration in system view.