3Com 10014298 manual Stp pathcost-standard, Calculates the default Path Cost for the connected

Configuring MSTP 199

Perform the following configuration in system view.

Table 204 Specifying the Standard To Be Followed in Path Cost Calculation

Operation	Command
Specify the standard to be adopted when the switch	stp pathcost-standard {
calculates the default Path Cost for the connected	dot1d-1998 dot1t legacy }
link
Restore the default standard to be used	undo stp pathcost-standard

By default, the switch calculates the default Path Cost of a port by the IEEE 802.1t standard.

Table 205 Cost Corresponding to the Port Speed of Different Standard

Link speed	Duplex state		dot1d-1998	dot1t value range	Huawei-3Com
			value range		cost value
0	-		65535	200,000,000	200,000
10Mb/s	Half-Duplex		100	2,000,000	2,000
	Full-Duplex		99	1,999,999	2,000
	Aggregated Link		95	1,000,000	1,800
	2	Aggregated	95	666,666	1,600
	Link 3 Ports
			95	500,000	1,400
	Aggregated Link
	4	Ports
100Mb/s	Half-Duplex		19	200,000	200
	Full-Duplex		18	199,999	200
	Aggregated Link		15	100,000	180
	2	Ports	15	66,666	160
	Aggregated Link
			15	50,000	140
	3	Ports
	Aggregated Link
	4	Ports
1000Mb/s	Full-Duplex		4	20,000	20
	Aggregated Link		3	10,000	18
	2	Ports	3	6,666	16
	Aggregated Link
			3	5,000	14
	3	Ports
	Aggregated Link
	4	Ports
10G/s	Full-Duplex		2	2,000	2
	Aggregated Link		1	1,000	1
	2	Ports	1	666	1
	Aggregated Link
			1	500	1
	3	Ports
	Aggregated Link
	4	Ports

Generally the path cost of the links in full duplex status is lower than those in half duplex status.