The value of the object svcTlsStpVersion specifies the
version of Spanning Tree Protocol the bridge is currently
running.
The value 'rstp' corresponds to the Rapid Spanning
Tree Protocol specified in IEEE 802.1D/D4-2003.
The value 'compDot1w' corresponds to the mode where the
Rapid Spanning Tree is backward compatible with IEEE
802.1w.
The value 'dot1w' corresponds to the Rapid Spanning
Tree Protocol fully conformant to IEEE 802.1w.
The value 'mstp' corresponds to the Multiple Spanning
Tree Protocol specified in IEEE 802.1Q-REV/D3.0-04/2005.
The value 'pmstp' corresponds to Provider MSTP protocol
compliant with IEEE-802.1ad-2005.
New values may be defined as future versions of the
protocol become available.