Allied Telesis AT-S63 - Manual (Page 310)

Chapter 17: MSTP
310 Section II: Advanced Features
The Configure MSTP Port Settings menu is shown in Figure 100.
Figure 100. Configure MSTP Port Settings Menu
6. Adjust the following parameters as necessary:
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 254.
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 0, Auto Update, which sets port cost depending
on the speed of the port. Default values are 2,000,000 for 10 Mbps
ports, 200,000 for a 100 Mbps ports, and 20,000 for one gigabit
ports.
Table 18 lists the RSTP port costs with Auto-Detect.
Allied Telesyn Ethernet Switch AT-9400 Series - AT-S63
Marketing
User: Manager 11:20:02 02-Oct-2004
Configure MSTP Port Settings
1 - Port Priority ............... 128
2 - Port Internal Path Cost ..... Auto Update
3 - Port External Path Cost ..... 200000
4 - Point-to-Point .............. Auto Detect
5 - Edge Port ................... Yes
C - Check Migration to MSTP on Selected Ports (MCHECK)
R - Return to Previous Menu
Enter your selection?
Table 18. RSTP Auto-Detect Port Costs
Port Speed Port Cost
10 Mbps 2,000,000
100 Mbps 200,000
1000 Mbps 20,000