Operational mode of Spanning Tree protocol:
- stpCompatibility means protocol operates as STP protocol
on all ports.
- rstpOperation means protocol operates as Rapid
Reconfiguration on all ports except on those ports where
legacy system has been detected.
- mstpOperation means protocol operates in native MSTP mode,
this option is available only if object
'hpicfBridgeRstpProtocolVersion' is set to 'ieee8021s'.