Comments on draft-ietf-6man-default-iids-01.txt
"Ralph Droms (rdroms)" <rdroms@cisco.com> Mon, 27 October 2014 18:03 UTC
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From: "Ralph Droms (rdroms)" <rdroms@cisco.com>
To: 6man WG <ipv6@ietf.org>
Subject: Comments on draft-ietf-6man-default-iids-01.txt
Thread-Topic: Comments on draft-ietf-6man-default-iids-01.txt
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Date: Mon, 27 Oct 2014 18:03:38 +0000
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I have a few comments on the new rev of draft-ietf-6man-default-iids. This message is posted to the 6man WG mailing list, with a bcc to the 6lo WG mailing list. The draft is of interest to the 6lo WG; please post responses to the 6man WG mailing list. In this document, I think it is important to be explicit about the considerations that might lead to a decision not to follow the RFC 2119 language recommendations in this document. My immediate concern is the 6LoWPAN standards, which use IIDs based on hardware addresses as a method for IPv6 header compression. I also think that some of the wording is too strong, which may lead to confusion in the cases where the recommendations in this document are not followed. In particular, I think the wording in the "Future Work" section is too strong, and does not allow for continued use of IIDs based on hardware addresses in 6LoWPAN and similar standards. As an editorial detail, the document lists the various RFCs that are update, but does not explicitly state what is to be updated in those documents. While the updates could be reasonably inferred, seems to me an explicit statement about what is to be updated would be good. With those comments in mind, I'll suggest the following text changes: In section 1, add this paragraph before the "NOTE": In some network technologies and adaptation layers, the use of an IID based on a hardware address offers some advantages. For example, the IP-over-IEEE802.15.4 standard in RFC6775 allows for compression of IPv6 addresses when the IID the address is based on the corresponding hardware address. The design and engineering tradeoffs between security and privacy, and network efficiency should be considered in any decision about the use of an IID based on a hardware address. Replace section 3 with: It is RECOMMENDED by this document that nodes implement and employ RFC 7217 as the default scheme for generating stable IPv6 addresses with SLAAC. Some specifications MAY use a an IID based on a node's hardware address if design and engineering considerations warrant. It is RECOMMENDED by this document that nodes do not employ IPv6 address generation schemes that embed the underlying hardware address in the Interface Identifier. In particular, this document RECOMMENDS that nodes do not generate Interface Identifiers with the schemes specified in [RFC2464], [RFC2467], [RFC2470], [RFC2491], [RFC2492], [RFC2497], [RFC2590], [RFC3146], [RFC3572], [RFC4338], [RFC4391], [RFC5121], and [RFC5072], and updates those documents with this recommendation. It is RECOMMENDED by this document that future specifications no not specify IPv6 address generation schemes that embed the underlying hardware address in the Interface Identifier. Future specifications MAY use a an IID based on a node's hardware address if design and engineering considerations warrant. In section 4, replace the last paragraph with: Future revisions or updates of these documents should take the issues of privacy and security mentioned in section 1 and explain any design and engineering considerations that lead to the use of IIDs based on a node's hardware address. I hope this input is helpful. - Ralph
- Comments on draft-ietf-6man-default-iids-01.txt Ralph Droms (rdroms)
- Re: Comments on draft-ietf-6man-default-iids-01.t… Fernando Gont
- RE: Comments on draft-ietf-6man-default-iids-01.t… Dave Thaler
- Re: Comments on draft-ietf-6man-default-iids-01.t… Fernando Gont
- Re: Comments on draft-ietf-6man-default-iids-01.t… Kerry Lynn
- Re: Comments on draft-ietf-6man-default-iids-01.t… Kerry Lynn
- RE: Comments on draft-ietf-6man-default-iids-01.t… Dave Thaler
- Re: Comments on draft-ietf-6man-default-iids-01.t… Fernando Gont
- Re: Comments on draft-ietf-6man-default-iids-01.t… Carsten Bormann
- Re: Comments on draft-ietf-6man-default-iids-01.t… Fernando Gont
- Re: Comments on draft-ietf-6man-default-iids-01.t… Kerry Lynn
- Re: Comments on draft-ietf-6man-default-iids-01.t… Fernando Gont
- RE: Comments on draft-ietf-6man-default-iids-01.t… Dave Thaler
- Re: Comments on draft-ietf-6man-default-iids-01.t… Kerry Lynn
- Re: Comments on draft-ietf-6man-default-iids-01.t… Glen Turner
- Re: Comments on draft-ietf-6man-default-iids-01.t… Michael Richardson
- Re: Comments on draft-ietf-6man-default-iids-01.t… Ole Troan
- Re: Comments on draft-ietf-6man-default-iids-01.t… Ralph Droms
- Re: Comments on draft-ietf-6man-default-iids-01.t… Ole Troan
- Re: Comments on draft-ietf-6man-default-iids-01.t… Ralph Droms
- Re: Comments on draft-ietf-6man-default-iids-01.t… Brian E Carpenter
- Re: Comments on draft-ietf-6man-default-iids-01.t… Ralph Droms
- Re: Comments on draft-ietf-6man-default-iids-01.t… Alexandru Petrescu
- Re: Comments on draft-ietf-6man-default-iids-01.t… Fernando Gont
- Missing references in the why64 draft [was Commen… Brian E Carpenter
- RE: Missing references in the why64 draft [was Co… Templin, Fred L
- RE: Missing references in the why64 draft [was Co… Templin, Fred L
- Re: Missing references in the why64 draft [was Co… Brian E Carpenter
- Re: Missing references in the why64 draft [was Co… Alexandru Petrescu
- Re: Missing references in the why64 draft [was Co… Mark ZZZ Smith