Planet IGS-801T [77/120] User s manual of igs 801m

Planet IGS-801 [77/120] User s manual of igs 801m
User’s Manual of IGS-801M
Port Priority
Controls the port priority. This can be used to control priority of ports having
identical port cost. (See above).
Default: 128
Range: 0-240, in steps of 16
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
Ethe
Half D
Full Du
Trunk
100
90
2,000,000
1,999,999
1,000,000
rnet
uplex
plex 95
Fast et
Half D
Full Du
Trunk
Ethern
uplex 19 200,000
plex 18
15
100,000
50,000
Gigabit Ethernet
Full Du
Trunk 3 5,000
plex 4 10,000
Table 4-6-2 Recommended STP Path Costs
Port Type Link Type IEEE 802.1w-2001
Ethernet
Half Duplex 2,000,000
Full Duplex
Trunk
1,000,000
500,000
Fast Ethernet
Half Duplex 200,000
100,000
50,000
Full Duplex
Trunk
Gigabit Ethern
Trunk
10,000
5,000
et
Full Duplex
Table 4-6-3 Default STP Path Costs
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