Spencer Dawkins has entered the following ballot position for draft-ietf-lisp-introduction-12: Yes
When responding, please keep the subject line intact and reply to all email addresses included in the To and CC lines. (Feel free to cut this introductory paragraph, however.) Please refer to http://www.ietf.org/iesg/statement/discuss-criteria.html for more information about IESG DISCUSS and COMMENT positions. The document, along with other ballot positions, can be found here: http://datatracker.ietf.org/doc/draft-ietf-lisp-introduction/ ---------------------------------------------------------------------- COMMENT: ---------------------------------------------------------------------- I'm a Yes because this draft is helpful to the largely uninitiated (that would include me), but I was consistently encountering questions that Adrian's Discuss and Comments answered, so I'd encourage you to work through his Comments, as well as his Discuss. Beyond that: In this text: 3.3.1. LISP Encapsulation ITRs encapsulate data packets towards ETRs. LISP data packets are encapsulated using UDP (port 4341), the source port is usually selected by the ITR using a 5-tuple hash of the inner header (so to be consistent in case of multi-path solutions such as ECMP [RFC2992]) and ignored on reception. would you ever use "virtual xTRs" with the same outermost IP addresses? If not, fine, but if so, would you need to use different destination ports to disambiguate them? Or does the Instance ID provide enough isolation to meet this need? I ask because adding virtual hosts to HTTP was a drag, so best for me to ask early! Further in the same paragraph, in this text: A particularity of LISP is that UDP packets should include a zero checksum [RFC6935] [RFC6936] that it is not verified in reception, LISP also supports non-zero checksums that may be verified. This decision was made because the typical transport protocols used by the applications already include a checksum, by neglecting the additional UDP encapsulation checksum xTRs can forward packets more efficiently. I'm wobbling between "should include a zero checksum" and "also supports non-zero checksums". Is that text saying something like this? LISP data packets are often encapsulated in UDP packets that include a zero checksum [RFC6935] [RFC6936] that is not verified when it is received, because LISP data packets typically include an inner transport protocol header with a non-zero checksum. By omitting the additional outer UDP encapsulation checksum, xTRs can forward packets more efficiently. If LISP data packets are encapsulated in UDP packets with non-zero checksums, the outer UDP checksums are verified when the UDP packets are received, as part of normal UDP processing. _______________________________________________ lisp mailing list [email protected] https://www.ietf.org/mailman/listinfo/lisp
