Interlogix NS3500-28T-4S User Manual - Manual (Page 150)

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(This applies to physical ports only. Aggregations are always forced
Point2Point ).
 Migrate 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)
Buttons
: Click to apply changes.
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 IEEE 802.1D-1998 IEEE 802.1w-2001
Ethernet 50-600 200,000-20,000,000
Fast Ethernet 10-60 20,000-2,000,000
Gigabit Ethernet 3-10 2,000-200,000
Table 4-6-1 Recommended STP Path Cost Range
Port Type Link Type IEEE 802.1D-1998 IEEE 802.1w-2001
Ethernet Half Duplex
Full Duplex
Trunk
100
95
90
2,000,000
1,999,999
1,000,000
Fast Ethernet Half Duplex
Full Duplex
Trunk
19
18
15
200,000
100,000
50,000
Gigabit Ethernet Full Duplex
Trunk
4
3
10,000
5,000
Table 4-6-2 Recommended STP Path Costs