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FriendlyNET FM2008/2009
43 User’s Manual
3.4.1.3 Per-port Configuration
PortState: View the spanning tree status for each port.
PathCost:
Port path cost is the spanning tree parameter that assigns a
cost factor to each port. The lower the assigned port path cost is, the more
likely that port will be accessed. The default port path cost for a 10Mbps or
100Mbps port is the result to the equation:
Path cost = 1000/LAN speed (in Mbps)
Therefore, for ports operating at 10Mbps, the default port path cost is 100.
For ports operating at 100Mbps, it is 10.
If you change the value, you
need to restart the switch for the change to take effect.
Priority:
The port priority is a spanning tree parameter that ranks each port,
so that if two or more ports have the same path cost, the STP selects the
path with the highest priority (the lowest numerical value). By changing the
priority of a port, you can make it more, or less, likely to become the root
port. The default value is 128, and the value range is 0 – 255.
If you
change the value, you need to restart the switch for the change to take
effect.