Planet WGS-4215 Series User Manual page 179

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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
If at any time the switch detects STP BPDUs, including Configuration or
Topology Change Notification BPDUs, it will automatically set the selected
interface to forced STP-compatible mode.
However, you can also use the Protocol Migration button to manually re-check
the appropriate BPDU format (RSTP or STP-compatible) to send on the selected
interfaces.
(Default: Disabled)
IEEE 802.1D-1998
50-600
10-60
3-10
Table 4-6-1 Recommended STP Path Cost Range
Link Type IEEE 802.1D-1998
Half Duplex 100
Full Duplex 95
Trunk 90
Half Duplex 19
Full Duplex 18
Trunk 15
Full Duplex 4
Trunk 3
Table 4-6-2 Recommended STP Path Costs
User's Manual of WGS Managed Series
IEEE 802.1w-2001
200,000-20,000,000
20,000-2,000,000
2,000-200,000
179
IEEE 802.1w-2001
2,000,000
1,999,999
1,000,000
200,000
100,000
50,000
10,000
5,000