I am an assigned INT directorate reviewer for . 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/. Based on my review, if I was on the IESG I would ballot this document as NO OBJECTION. Comments: The draft specifies new routing packet header formats to enable compressing the headers. The compression algorithms that can be used are not clearly specified - maybe they are obvious from the changes in the headers. The draft includes a list of implementations, including some open source implementations. There is a promise of efficiency gains from using compressed headers, but no theoretical estimates of such gains, or practical measurements are given - this is likely hardware dependent, for example gains with Smart NICS may differ from conventional network hardware. There maybe cases where it is not efficient to compress the header, a best practices document may be helpful for users and additional implementers.