Allied Telesis AT-S39 - Manual (Page 255)

Section III: Web Browser Management
255
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.
Root Bridge
The MAC address of the bridge functioning as the root bridge in
the spanning tree domain. This value is for display purposes only
and cannot be changed.
Root Priority
The priority number of the root bridge.
3. After you have made your changes, click Apply.
4. To adjust a port’s RSTP settings, click on the port in the switch image
and click Modify. You can select more than one port at a time.
The Port Rapid Spanning Tree Protocol window in Figure 85 is
displayed.
Figure 85 RSTP Port Configuration Window
5. Adjust the settings as desired. The parameters are described below.
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 of
128). For a list of the increments, refer to Table 7, RSTP Port
Priority Value Increments on page 95.