The type of the Spanning Tree Protocol (STP) running on
this VLAN. This object is only instanciated when the
value of the corresponding instance of vtpVlanType has a
value of 'fddiNet' or 'trNet'.
The value returned by this object depends upon the value
of the corresponding instance of vtpVlanEditStpType.
- 'ieee' indicates IEEE STP is running exclusively.
- 'ibm' indicates IBM STP is running exclusively.
- 'hybrid' indicates a STP that allows a combination of
IEEE and IBM is running.
The 'hybrid' STP type results from tokenRing/fddi VLANs
that are children of this trNet/fddiNet parent VLAN being
configured in a combination of SRT and SRB
vtpVlanBridgeTypes while the instance of
vtpVlanEditStpType that corresponds to this object is set
to 'auto'.