I have been asked to review this draft on behalf of the OPS directorate.  This draft updates RFC8059 to specify PIM Receiver RLOC Join/Prune attribute to connect multiple LISP sites when underlay IP multicast is used.  Overall, I thought the document was clear, but I did find a few nitty issues.  The biggest point of confusion for me was the mention of "oif-list" in Section 3.3.  This is defined in RFC6381 (experimental) where they use OIF-list.  I think at least an informative reference is needed for clarity of this term and the form "OIF-list" should be used.

Other nits:

Section 3.2:

OLD:

This field MUST be used only  when the

NEW:

This field MUST only be used when then

I think this form is a bit clearer with the normative MUST.

Section 3.3:

You have a duplicate "tree" there (i.e., "tree tree").