Allied Telesis AT-S26 - Manual (Page 51)

AT-S26 Version 2.0.1 User’s Guide
51
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.