I am an assigned INT directorate reviewer for draft-ietf-teas-5g-ns-ip-mpls. These comments were written primarily for the benefit of the Internet Area Directors. Document editors and shepherd(s) should treat these comments just like they would treat comments from any other IETF contributors and resolve them along with any other Last Call comments that have been received. For more details on the INT Directorate, see https://datatracker.ietf.org/group/intdir/about/ <https://datatracker.ietf.org/group/intdir/about/>.

Summary: I don't think there are any Internet issues in this document. I think it's in good shape for publishing as Informational document. I found the Appendix C was helpful, as I'm not an expert in 5G deployments.

This document recommends encoding of the IP addressing in section 4.2 using most significant 96-bits to simplify mapping tables.  There is nothing wrong with this, but it should be noted for privacy and other considerations if/when deploying over the public internet space.  Section 5.2.1 allows for IPv6 encapsulation using SR6, so there is no issue with MTU that any encapsulation technique would encounter.  It uses DSCP for QoS, so there no use of flow labels or additional headers.

Nits:
Figure 32 table has some formatting errors.