Allied Telesis AT-S62 User Manual
Page 485
AT-S62 Management Software Command Line Interface User’s Guide
Section IV: Spanning Tree Protocols
485
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 range is 4 to 30
seconds. 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 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 decremented every time the
BPDU crosses a bridge within a MSTP region. After the
counter reaches zero, the BPDU is deleted. The counter
is reset to its original value if the BPDU crosses a MSTP
regional boundary. The range is 1 to 40. The default is
20.
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 reversion number of an MSTP region. This
is an arbitrary number that you assign to a region. The
reversion level must be the same on all bridges in a
region. Different regions can have the same reversion
level without conflict. The range is 0 (zero) to 255. The
default is 0.
Description
This command configures the following MSTP parameter settings.
Hello time