For a static P2MP policy, a single P2MP policy is assigned to an SPMSI. All the (S,G)s that are required to switch to the SPMSI and send an SPMSI AD route use this single P2MP policy. To assign (S,G)s to a different P2MP policy, use multi-stream SPMSIs and assign different (S,G)s to different SPMSIs.