Allied Telesis AT-S62 - Manual (Page 251)

AT-S62 Web Browser Interface User’s Guide
Section IV: Spanning Tree Protocols 251
Bridge Max Age
The length of time after which stored bridge protocol data units
(BPDUs) are deleted by the bridge. All bridges in a bridged LAN
use this aging time to test the age of stored configuration
messages called bridge protocol data units (BPDUs). For example,
if you use the default value 20, all bridges delete current
configuration messages after 20 seconds. This parameter can be
from 6 to 40 seconds.
In selecting a value for maximum age, the following rules must be
observed:
MaxAge must be greater than (2 x (HelloTime + 1))
MaxAge must be less than (2 x (ForwardingDelay - 1))
Note
The aging time for BPDUs is different from the aging time used by
the MAC address table.
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 the desired changes, click Apply.
4. To adjust a port’s STP settings, click on the port in the switch image
and click Modify. You can select more than one port at a time.
The STP Port Settings window is shown in Figure 93.
Figure 93 STP 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 for