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220 CHAPTER 10: USING RSTP COMMANDS
[4500]stp bpdu-protection
stp cost Syntax
stp cost cost
undo stp cost
View
Ethernet Port View
Parameter
cost: Specifies the path cost, ranging from 1 to 2000000.
Description
Use the stp cost command to configure the path cost on a spanning tree for the
current Ethernet port.
Use the undo stp cost command to restore the default cost.
By default, the bridge gets the path cost directly through the speed of the link
connected to the port.
The path cost of an Ethernet port is related to the link speed. You can refer to the
following table. RSTP will check the link speed of the port and get the path cost
directly. It is recommended to set the cost to the default value and let RSTP query
the path cost of the port.
Example
To configure the path cost of Ethernet1/0/1 to 200000, enter the following:
<4500>system-view
System View: return to User View with Ctrl+Z.
[4500]interface Ethernet1/0/1
[4500-Ethernet1/0/1]stp cost 200000
stp edged-port Syntax
stp edged-port { enable | disable }
undo stp edged-port
View
Ethernet Port View
Table 28 Path cost for ports at different link speeds
Link Speed
IEEE Recommended
Value
IEEE Recommended
Range
Switch Range
10Mbps 2000000 20000 to 20000000 1 to 2000000
100Mbps 200000 20000 to 2000000 1 to 2000000
1Gbps 20000 2000 to 200000 1 to 2000000
10Gbps 2000 200 to 20000 1 to 2000000