Allied Telesis AT-S62 - Manual (Page 750)

Chapter 45: STP, RSTP, and MSTP
Section VIII: Web Browser Management 750
6 - Bridge Identifier
The MAC address of the bridge. The bridge identifier is used as a
tie breaker in the selection of the root bridge when two or more
bridges have the same bridge priority value. This value cannot be
changed.
3. After you have made your changes, click Apply.
4. To adjust RSTP port settings, click on the port in the switch image and
click Modify. You can select more than one port at a time.
The RSTP Port Settings window is shown in Figure 269.
Figure 269 RSTP Port Settings Window
5. Adjust the settings as desired. The parameters 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 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 Cost
The spanning tree algorithm uses the cost parameter to decide
which port provides the lowest cost path to the root bridge for
that LAN. The range is 0 to 20,000,000. The default setting is
Automatic detect, which sets port cost depending on the speed of
the port. The default Auto-detect settings are listed in Table 18 on
page 381 and Table 19 on page 381.
3 - 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.