Allied Telesis AT-S63 - Manual (Page 484)

Chapter 28: Multiple Spanning Tree Protocol Commands
484 Section V: Spanning Tree Protocols
SET MSTP
Syntax
set mstp [default]
[forceversion=stpcompatible|forcestpcompatible|
normalmstp] [hellotime=
hellotime ]
[forwarddelay= forwarddelay ] [maxage= maxage ]
[maxhops= maxhops ] [configname=" name "]
[revisionlevel= number ]
Parameters
default Disables MSTP and returns all bridge and port MSTP
settings to the default values. This parameter cannot be
used with any other parameter. (This parameter
performs the same function as the PURGE MSTP
command.) The spanning tree protocol must be
disabled to use this parameter.
forceversion Controls whether the bridge will operate with MSTP or
in an STP-compatible mode. If you select MSTP, the
bridge will operate all ports in MSTP, except for those
ports that receive STP or RSTP BPDU packets. If you
select STP Compatible or Force STP Compatible, the
bridge uses its MSTP parameter settings, but sends
only STP BPDU packets from the ports
The options are:
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.
stpcompatible or The bridge operates in an STP-
forcestpcompatible compatible mode where it uses
the MSTP parameter settings,
but transmits only STP BPDU
packets from the ports. These
options are equivalent.
Note
Selecting the STP-compatible mode deletes all spanning tree
instances on the switch.