Allied Telesis AT-S63 - Manual (Page 399)

AT-S63 Management Software Command Line Interface User’s Guide
399
normalmspt The bridge uses MSTP. The
bridge sends out MSTP BPDU
packets from all ports except for
those ports connected to bridges
running STP. This is the default
setting.
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.
This parameter effects only those ports operating in the
STP compatible mode.
maxage Specifies the length of time, in seconds, 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 of 20, all
bridges delete current configuration messages after 20
seconds. The range of this parameter is 6 to 40
seconds. The default is 20 seconds.
Note
The value for the maxage parameter must be greater than
(2 x (hellotime +1)) and less than (2 x (forwarddelay -1)).
maxhops Specifies the maximum hops counter. MSTP regions
use this parameter to discard BPDUs. The Max Hop
counter in a BPDU is decreased every time the BPDU
crosses an MSTP regional boundary. After the counter
reaches zero, the BPDU is deleted.
configname Specifies the name of the MSTP region. The range is 0
(zero) to 32 alphanumeric characters. The name is
case-sensitive and must be the same on all bridges in a
region. Examples include Sales Region and Production
Region. The name must be enclosed in quotes.
revisionlevel Specifies the version number of an MSTP region. The
range is 0 (zero) to 255. This is an arbitrary number that
you assign to a region. The version level must be the