Planet GS-4210-16T2S User Manual page 160

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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
User's Manual of GS-4210-16T2S_24T2S_16P2S_24P2S_48T4S
Port Type IEEE 802.1D-1998
50-600
Ethernet
10-60
Fast Ethernet
3-10
Gigabit Ethernet
Table 4-6-1: Recommended STP Path Cost Range
Link Type
Half Duplex
Full Duplex
Trunk
Half Duplex
Full Duplex
Trunk
Full Duplex
Trunk
Table 4-6-2: Recommended STP Path Costs
Link Type
Half Duplex
Full Duplex
Trunk
Half Duplex
Full Duplex
Trunk
Full Duplex
Trunk
Table 4-6-3: Default STP Path Costs
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
160
IEEE 802.1w-2001
2,000,000
1,999,999
1,000,000
200,000
100,000
50,000
10,000
5,000