Allied Telesis AT-S39 - Manual (Page 94)

Chapter 11: Spanning Tree Protocol Commands
94
SET STP
Syntax
set stp [default] [priority=priority]
[hellotime=hellotime] [forwarddelay=forwarddelay]
[maxage=maxage]
Parameters
default Disables STP and returns all bridge and port STP
settings to the default values. (This option performs
the same function as the RESET STP command.)
priority Specifies the priority number for the bridge. This
number is used in determining the root bridge for STP.
The bridge with the lowest priority number is selected
as the root bridge. If two or more bridges have the
same priority value, the bridge with the numerically
lowest MAC address becomes the root bridge. When a
root bridge goes off-line, the bridge with the next
priority number automatically takes over as the root
bridge. This parameter can be from 0 (zero) to 65,535,
with 0 being the highest priority. The default is 32,768.
hellotime Specifies the time interval between generating and
sending configuration messages by the bridge. This
parameter can be from 1 to 10 seconds. The default is
2 seconds.
forwarddelay Specifies 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, resulting in network loops.
The default is 15 seconds.
maxage Specifies 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 20, all bridges delete current
configuration messages after 20 seconds. This
parameter can be from 6 to 40 seconds. The default is
20 seconds.