Hi, I have reviewed draft-ietf-mip4-multiple-tunnel-support-12.txt as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written with the intent of improving the operational aspects of the IETF drafts. Comments that are not addressed in last call may be included in AD reviews during the IESG review. Document editors and WG chairs should treat these comments just like any other last call comments. I believe the document is 'Ready' for publication. The I-D adds the ChaCha20 stream cipher along with the Poly1305 authenticator into IKEv2 and IPsec. The main motivation seems to be that ChaCha20 can serve as standby cipher in case security relevant issues with AES will be identified. Section 4 says 'the value xxx (TBA by IANA) should be used'; since I am not familiar with the internals of IKE, I am nore sure if this is the same as the value ENCR_CHACHA20_POLY1305 mentioned in section 2 and the IANA considerations (I assume it is the same and in that case I would suggest to use ENCR_CHACHA20_POLY1305 instead of xxx - if it is not the same, well, then the text in the IANA Considerations is incomplete). I note that this document has a normative reference to RFC7539, which is Informational (for reasons I am not aware of). /js -- Juergen Schoenwaelder Jacobs University Bremen gGmbH Phone: +49 421 200 3587 Campus Ring 1 | 28759 Bremen | Germany Fax: +49 421 200 3103 < http://www.jacobs-university.de/ >