Allied Telesis AT-S24 User Manual
Page 50
Managing a Switch
50
Max Age Time
The aging time can be from 6 to 40 seconds. The default is 20 seconds.
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 20, all bridges delete
current configuration messages after 20 seconds.
Note
The aging time for BPDUs is different from the aging time used by
the MAC address table.
Hello Time
Hello time can be from 1 to 10 seconds, with 2 seconds as the default.
Bridges use this parameter to determine the time interval between
generating and sending configuration messages.
Forwarding Delay
The default is 15 seconds. The time indicates the waiting period
before a bridge changes to a new state, for example, becomes the
new root bridge after the topology changes. If the bridge transitions
too soon, not all links may have yet adapted to the change; therefore,
loops may result.
Caution
You should consult the IEEE 802.1d standard before changing the
Max Age Time, the Hello Time, and the Forwarding Delay
parameters.
4. After you have adjusted the settings, return to the Main Menu.