[lisp] Alvaro Retana's No Objection on draft-ietf-lisp-gpe-06: (with COMMENT)

[Alvaro Retana <[e-mail]>]

Alvaro Retana has entered the following ballot position for
draft-ietf-lisp-gpe-06: No Objection

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COMMENT:
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I have some non-blocking comments (and nits):

(1) §1: "LISP-GPE MAY also be used to extend the LISP Data-Plane header..."  I
think that MAY is out of place because there's nothing normative about the
statement.

(2) §3: "If the P-bit is clear (0) the LISP header conforms to the definition
in [I-D.ietf-lisp-rfc6830bis]."  I find this statement a little confusing
because even with the bit set, the header still conforms to rfc6830bis, except
for the Nonce/Map-Version field. IOW, it sounds as if the bit makes the header
non-conforming.

(3) §3: For clarity, it would be nice to add a figure showing the header with
the P and V bits set.

(4) §3.1: "...the specification of a new encapsulated payload MUST contain an
analysis of how LISP-GPE SHOULD deal with..."  s/SHOULD/should  In this case
the "SHOULD" is not normative.

(5) For IP packets, two encapsulation mechanisms exist, the base one defined in
rfc6830bis and the generic one defined in this document.  When encapsulating
towards a GPE-capable router, which mechanisms should be used?  Should one have
preference over the other?  I'm thinking it probably doesn't matter (since the
receiving router can understand both) -- I'm trying to figure out whether there
are operational considerations or guidance that are worth mentioning.