The value of tmnxBsxAarpInstPeerEPSdpBindId specifies the Spoke SDP
end point for the dual homed peer.
The specification of a tmnxBsxAarpInstPeerEPSdpBindId is mutually
exclusive with the specification of tmnxBsxAarpInstPeerEPSapPortId,
tmnxBsxAarpInstPeerEPSapEncap and tmnxBsxAarpInstPeerEPSapEncType.