Allied-telesis AT-S63 Manual do Utilizador descarregar pdf (Página 253)

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AT-S63 Management Software Menus Interface User’s Guide

Section II: Advanced Features 253

Table 14 lists the STP port costs with Auto-Detect when a port is part of a

port trunk.

Table 15 lists the RSTP port costs with Auto-Detect.

Table 16 lists the RSTP port costs with Auto-Detect when the port is part

of a port trunk.

You can override Auto-Detect and set the port cost manually.

Port Priority

If two paths have the same port cost, the bridges must select a preferred

path. In some instances this can involve the use of the port priority

parameter. This parameter is used as a tie breaker when two paths have

the same cost.

The range for port priority is 0 to 240. As with bridge priority, this range

is broken into increments, in this case multiples of 16. To select a port

Table 14. STP Auto-Detect Port Trunk Costs

Port Speed Port Cost

10 Mbps 4

100 Mbps 4

1000 Mbps 2

Table 15. RSTP Auto-Detect Port Costs

Port Speed Port Cost

10 Mbps 2,000,000

100 Mbps 200,000

1000 Mbps 20,000

Table 16. RSTP Auto-Detect Port Trunk Costs

Port Speed Port Cost

10 Mbps 20,000

100 Mbps 20,000

1000 Mbps 2,000

1 2 ... 248 249 250 251 252 253 254 255 256 257 258 ... 709 710

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