Data packet source address translation.
PIM control packet (PIM payload) address translation, including Auto-RP and PIM Version 2 bootstrap router (BSR).
The mstat, mrinfo, and mtrace command requests and responses.SDR advertisement or application payload.
With the above translations, PIM works in an enterprise domain even if part of the domain is behind NAT. All sources and receivers behind the NAT router can send and receive packets to the rest of the PIM cloud, and take advantage of the RP/RP mapping agent on either side of the cloud.