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9.5 Spanning Tree.
RSTP (Rapid spanning tree protocol) can be enabled at this screen. Various timer settings can also be set. Use this
screen to change the priority and the path cost for specific ports. The priority default value is 128, and the value range
is 0–240 (in multiples of 16).
The lower the assigned port path cost is, the more likely that port will be accessed. The default port path cost for a 10
Mbps or 100 Mbps port is the result of the equation:
Path cost = 1000/LAN speed (in Mbps)
Therefore, for 10 Mbps ports, the default port path cost is 100. For 100 Mbps ports, it is 10. To allow for faster
networks, the port path cost for a 1000 Mbps port is set by the standard at 4.
The default values for path cost is determined by the operating port speed:
• For ports operating in 1000Mb speed, the path cost is 20000
• For ports operating in 100Mb speed, the path cost is 200000
For ports operating in 10Mb speed, the path cost is 2000000
RSTP can be designated on a port by port basis.
74 Asante IntraCore IC39240/480 User’s Manual