When a VPLS has STP enabled, each spoke-SDP within the VPLS has STP enabled by default. The operation of STP on each spoke-SDP is governed by:
Spoke-SDP STP administrative state
Spoke-SDP virtual port number
Spoke-SDP priority
Spoke-SDP path cost
Spoke-SDP edge port
Spoke-SDP auto edge
Spoke-SDP link type