Allied-telesis AT-S62 Bedienungsanleitung PDF herunterladen (Seite 381)

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AT-S62 User’s Guide

Section IV: Spanning Tree Protocols 381

4. Adjust the port settings as needed. The selections are described

below:

1 - Port Priority

This parameter is used as a tie breaker when two or more ports are

determined to have equal costs to the regional root bridge. The

range is 0 to 240 in increments of 16. The default value is 8 (priority

value 128). For a list of the increments, refer to Table 17, Port

Priority Value Increments on page 334.

2- Port Internal Path Cost

The port cost of the port if the port is connected to a bridge which

is part of the same MSTP region. The range is 0 to 200,000,000. The

default setting is Auto-detect, which sets port cost depending on

the speed of the port.

Table 18 lists the MSTP port costs with Auto-Detect.

Table 19 lists the MSTP port costs with Auto-Detect when the port

is part of a port trunk.

3- Port External Path Cost

The port cost of the port if the port is connected to a bridge which

is a member of another MSTP region or is running STP or RSTP. The

range is 0 to 200,000,000. The default setting is 200,000.

4 - Point-to-Point

This parameter defines whether the port is functioning as a point-

to-point port. For an explanation of this parameter, refer to Point-

to-Point Ports and Edge Ports on page 336.

Table 18 MSTP Auto-Detect Port Costs

Port Speed Port Cost

10 Mbps 2,000,000

100 Mbps 200,000

1000 Mbps 20,000

Table 19 MSTP Auto-Detect Port Trunk Costs

Port Speed Port Cost

10 Mbps 20,000

100 Mbps 20,000

1000 Mbps 2,000

1 2 ... 376 377 378 379 380 381 382 383 384 385 386 ... 861 862

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