Re: [atn] [EXTERNAL] Re: Embedding IP information in an IPv6 address (OMNI)
otroan@employees.org Wed, 14 October 2020 17:45 UTC
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Subject: Re: [atn] [EXTERNAL] Re: Embedding IP information in an IPv6 address (OMNI)
From: otroan@employees.org
In-Reply-To: <8c53ec2baafc4b1f827996d822ef67b8@boeing.com>
Date: Wed, 14 Oct 2020 19:45:15 +0200
Cc: 神明達哉 <jinmei@wide.ad.jp>, Robert Moskowitz <rgm@labs.htt-consult.com>, 6man WG <ipv6@ietf.org>, "atn@ietf.org" <atn@ietf.org>
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References: <7af0ab36-4a6b-cb44-609c-6e81b364a01c@labs.htt-consult.com> <8009C8E3-E654-4623-BDC8-F794346C33B1@gmail.com> <026e1f94f9d646f38e6912174998b929@boeing.com> <CAO42Z2x7B3sjaV-v1Ox8Vojjv6Vcfpn58PYUOp5jj6iixJau7A@mail.gmail.com> <6c1b8260f1014b4bbcb05e618cb83aa3@boeing.com> <2d9a93ce82be4364bf9004ca94812641@boeing.com> <CAJE_bqc1YKy2ZFrq92gQkbtvq2cvx9EHYwu6rakP1LoLE8_kSw@mail.gmail.com> <301d22a813914f7c845b4715c4fdd628@boeing.com> <CE2F3208-2497-4EF7-9948-2E2000D49838@employees.org> <8c53ec2baafc4b1f827996d822ef67b8@boeing.com>
To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Thanks Fred for the explanation. >>> What in your opinion would be easier - a) update RFC4291 to allow coding of >>> the link-local address 54 zero bits, or b) update RFC4861 to allow routers to use >>> site-local addresses instead of link-local? >>> >>> We need a good answer for this - either a) or b). The benefit of what is being >>> proposed by OMNI is too great to simply say no to both. >> >> It's unclear to me what the benfits are. >> Would you be able to summarize here, or point to the relevant paragraphs in the OMNI draft? > > The benefits include: > > + a means for configuring a unique IPv6 link-local address (i.e., the "OMNI LLA") > that is known to be unique on the link without requiring SLAAC or MLD/DAD Benefit is in the eye of the beholder. Manual configuration is a common cause of duplicate address. Why can't that happen here? If you the setup here is that you have "some" information pre-configured. Why not also the link-local address? > + a means for asserting and/or receiving IPv6 GUA prefixes without explicit > prefix delegation messaging over the wire Implied prefix delegation by the implementation knowing that it should find it's prefix at bit position <n:m> in the packet... doesn't seem like following the principle of least astonishment. Likewise having the routing system glean information from RSs... is that really the level of adaptiveness you need from a routing system? I'm not sure I get the motivation between these choices? As opposed to using existing IPv6 mechanisms for the same. Best regards, Ole > > So, for example, if a node has been pre-assigned an IPv6 GUA prefix 2001:db8:1:2::/64 > then it can configure the OMNI LLA fe80:2001:db8:1:2:: (but note that this is not RFC4862 > SLAAC; it is a simplified means of setting up an administratively-configured LLA that is > known to be unique on the link). The node can then assert its IPv6 GUA to the routing > system by sending an RS with fe80:2001:db8:1:2:: as the source address and with a > Prefix Length value 'N'. > > In a second example, if a node has no pre-assigned IPv6 GUA then it can send an RS > message with IPv6 address unspecified. When it gets back an RA, it can determine its > (delegated) IPv6 GUA prefix by examining the destination address. For example, if > the RA message has destination address fe80:2001:db8:3:4:: and the message includes > a Prefix Length 'N' and lifetime value, it can adopt fe80:2001:db8:3:4:: as its own > OMNI LLA and adopt 2001:db8:1:2::/N as its own IPv6 GUA prefix. > > There are also IPv4-compatible OMNI LLAs of the form fe80::ffff:[v4addr] and > "Service" OMNI LLAs of the form fe80::[32-bit ID]. All of these address forms > appear in Section 7 of the document, and their use is discussed throughout: > > https://datatracker.ietf.org/doc/draft-templin-6man-omni-interface/ > > Thanks - Fred > >> Best regards, >> Ole=
- Embedding IP information in an IPv6 address (OMNI) Templin (US), Fred L
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: [atn] Embedding IP information in an IPv6 add… Robert Moskowitz
- Re: [atn] Embedding IP information in an IPv6 add… Templin (US), Fred L
- Re: [atn] Embedding IP information in an IPv6 add… Fred Baker
- RE: [EXTERNAL] Re: [atn] Embedding IP information… Templin (US), Fred L
- Re: [EXTERNAL] Re: [atn] Embedding IP information… Mark Smith
- RE: [EXTERNAL] Re: [atn] Embedding IP information… Templin (US), Fred L
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [EXTERNAL] Re: [atn] Embedding IP information… Mark Smith
- RE: [EXTERNAL] Re: [atn] Embedding IP information… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… 神明達哉
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… Bob Hinden
- Re: [atn] [EXTERNAL] Re: Embedding IP information… otroan
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [EXTERNAL] Re: [atn] Embedding IP information… Fernando Gont
- Re: Embedding IP information in an IPv6 address (… Fernando Gont
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… otroan
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… 神明達哉
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: [EXTERNAL] Re: Embedding IP information in an… Philip Homburg
- Re: [EXTERNAL] Re: Embedding IP information in an… Alexandre Petrescu
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… Philip Homburg
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… otroan
- RE: [atn] [EXTERNAL] Re: Embedding IP information… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… otroan
- Re: Embedding IP information in an IPv6 address (… Bob Hinden
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Bob Hinden
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Bob Hinden
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Bob Hinden
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Bob Hinden
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- Re: [EXTERNAL] Embedding IP information in an IPv… Bob Hinden
- RE: [EXTERNAL] Embedding IP information in an IPv… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Re: Embedding IP information… Philip Homburg
- Re: Embedding IP information in an IPv6 address (… Behcet Sarikaya
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Ted Hardie
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- Re: [EXTERNAL] Re: Embedding IP information in an… Ole Troan
- RE: [EXTERNAL] Re: Embedding IP information in an… Manfredi (US), Albert E
- Re: [EXTERNAL] Embedding IP information in an IPv… Bob Hinden
- Re: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- RE: [atn] [EXTERNAL] Embedding IP information in … Templin (US), Fred L
- Re: [atn] [EXTERNAL] Embedding IP information in … Bob Hinden
- RE: [atn] [EXTERNAL] Embedding IP information in … Templin (US), Fred L
- RE: [atn] [EXTERNAL] Embedding IP information in … Vasilenko Eduard
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: [atn] [EXTERNAL] Embedding IP information in … Bob Hinden
- Re: Starlink --- "simpler than IPv6" Templin (US), Fred L
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Starlink --- "simpler than IPv6" Behcet Sarikaya
- Re: Starlink --- "simpler than IPv6" Templin (US), Fred L
- Re: Starlink --- "simpler than IPv6" Behcet Sarikaya
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Bob Hinden
- RE: Starlink --- "simpler than IPv6" Templin (US), Fred L
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- Re: [atn] Embedding IP information in an IPv6 add… Michael Richardson
- RE: Embedding IP information in an IPv6 address (… Templin (US), Fred L
- Re: Starlink --- "simpler than IPv6" Behcet Sarikaya
- Re: Starlink --- "simpler than IPv6" Templin (US), Fred L
- Re: Embedding IP information in an IPv6 address (… Philip Homburg
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- RE: [EXTERNAL] Re: Starlink --- "simpler than IPv… Templin (US), Fred L
- Re: Starlink --- "simpler than IPv6" Behcet Sarikaya
- Re: Starlink --- "simpler than IPv6" Bob Hinden
- Re: [atn] Embedding IP information in an IPv6 add… Bob Hinden
- Re: Embedding IP information in an IPv6 address (… Michael Richardson
- RE: [EXTERNAL] Re: [atn] Embedding IP information… Templin (US), Fred L
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- Re: [EXTERNAL] Re: Embedding IP information in an… Philip Homburg
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- RE: [EXTERNAL] Re: Embedding IP information in an… Templin (US), Fred L
- Re: Starlink --- "simpler than IPv6" Behcet Sarikaya
- Re: Starlink --- "simpler than IPv6" Bob Hinden
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu
- Re: Starlink --- "simpler than IPv6" Bob Hinden
- Re: [EXTERNAL] Embedding IP information in an IPv… Bob Hinden
- Re: Starlink --- "simpler than IPv6" Behcet Sarikaya
- Re: Starlink --- "simpler than IPv6" Bob Hinden
- Re: Starlink --- "simpler than IPv6" Alexandre Petrescu