Planet GS-4210-24T4S User Manual page 170

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By default, the system automatically detects the speed and duplex mode used on each port, and configures the path cost
according to the values shown below. Path cost "0" is used to indicate auto-configuration mode. When the short path cost
method is selected and the default path cost recommended by the IEEE 8021w standard exceeds 65,535, the default is set to
65,535.
Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet
Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet
Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet
interfaces.
(Default: Disabled)
IEEE 802.1D-1998
50-600
10-60
3-10
Table 4-3-2 Recommended STP Path Cost Range
Link Type
Half Duplex
Full Duplex
Trunk
Half Duplex
Full Duplex
Trunk
Full Duplex
Trunk
Table 4-3-3 Recommended STP Path Costs
Link Type
Half Duplex
Full Duplex
Trunk
Half Duplex
Full Duplex
Trunk
Full Duplex
Trunk
Table 4-3-4 Default STP Path Costs
User's Manual of GS-4210 Series
IEEE 802.1w-2001
200,000-20,000,000
20,000-2,000,000
2,000-200,000
IEEE 802.1D-1998
100
95
90
19
18
15
4
3
IEEE 802.1w-2001
2,000,000
1,000,000
500,000
200,000
100,000
50,000
10,000
5,000
170
IEEE 802.1w-2001
2,000,000
1,999,999
1,000,000
200,000
100,000
50,000
10,000
5,000