snVLanByPortCfgStpPriority 1.3.6.1.4.1.11.2.3.7.11.12.1.3.2.7.1.4

dot1dStpPriority : The value of the write-able portion of the Stp ID, i.e., the first two octets of the (8 octet long) Bridge ID. The other (last) 6 octets of the Bridge ID are given by the value of the base bridge address - dot1dBaseBridgeAddress.