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Point-to-point
Buttons
: Click to apply changes
: Click to undo any changes made locally and revert to previously saved values.
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
A port entering error-disabled state due to this setting is subject to the bridge Port
Error Recovery setting as well.
Controls whether the port connects to a point-to-point LAN rather than a shared
medium. This can be automatically determined, or forced either true or false.
Transitions to the forwarding state is faster for point-to-point LANs than for
shared media.
IEEE 802.1D-1998
50-600
10-60
3-10
Table 4-7-1: 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 4-7-2: Recommended STP Path Costs
Link Type
Half Duplex
Full Duplex
Trunk
Half Duplex
Full Duplex
IEEE 802.1w-2001
200,000-20,000,000
20,000-2,000,000
2,000-200,000
IEEE 802.1w-2001
2,000,000
1,000,000
500,000
200,000
100,000
156
User's Manual of IGS-20040MT
IEEE 802.1w-2001
2,000,000
1,999,999
1,000,000
200,000
100,000
50,000
10,000
5,000
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