Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P. Architecture? (Fwd: Errata #5933 for RFC8200)

Joseph Touch <touch@strayalpha.com> Fri, 28 February 2020 04:27 UTC

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From: Joseph Touch <touch@strayalpha.com>
In-Reply-To: <7A8582D7-1647-41EC-808D-46C380565014@isc.org>
Date: Thu, 27 Feb 2020 20:27:44 -0800
Cc: Tom Herbert <tom@herbertland.com>, Internet Architecture Board <iab@iab.org>, architecture-discuss@iab.org, Internet Area <int-area@ietf.org>, IETF-Discussion <ietf@ietf.org>
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References: <876c9105-3da4-e614-2db0-bea025b54663@si6networks.com> <7749f91f-03f1-cc14-bae8-5fe68c88879f@si6networks.com> <CALx6S36wN7VEi_rxLC1ETcTvkGaPhs20KhQrGWAGGTrCL5OT+g@mail.gmail.com> <d41a94f5ede994b9e14605871f9f7140@strayalpha.com> <CALx6S34n58pD4o5wyb7CDDLTH63OxksMDxKZr6uJN+NO0kVboQ@mail.gmail.com> <7A8582D7-1647-41EC-808D-46C380565014@isc.org>
To: Mark Andrews <marka@isc.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/architecture-discuss/HOS92QCOt6FCeUaDs3Fk9zkboS4>
Subject: Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P. Architecture? (Fwd: Errata #5933 for RFC8200)
Precedence: list

> On Feb 27, 2020, at 3:54 PM, Mark Andrews <marka@isc.org> wrote:
> ...
> Encapsulation doesn’t make the packet larger.

Not strictly; it does make the unit of transfer larger. It’s the tunnel ingress’s job to adapt to that, e.g., using source fragmentation at the ingress.

> It is no different to
> talking a packet from a ethernet and pushing it out a PPP link.  The
> Enclosing headers differ in sizes but the IPv6 packet remains the
> same size.

We’re talking about the unit of transfer - which does get larger….

> 
> The difference with encapsulation, from the non encapsulation cases, is
> that PTBs are sent to the encapsulating node which has to synthesis a
> PTB to the original (as far as the encapsulating node is concerned)

No, it really doesn’t. I don’t expect to chop packets into 48 byte units just to go over an ATM “hop” in an IP path. The only party who needs to know about the PTB of a tunnel transit is the tunnel ingress. Again, see draft-intarea-tunnels.

Joe

[arch-d] Is IPv6 End-to-End? R.I.P. Architecture?… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Phillip Hallam-Baker
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Robert Raszuk
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Bernard Aboba
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Robert Raszuk
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Robert Raszuk
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Robert Raszuk
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joe Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Mark Andrews
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Robert Raszuk
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Phillip Hallam-Baker
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Phillip Hallam-Baker
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Christian Huitema
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Bernard Aboba
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Phillip Hallam-Baker
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Dino Farinacci
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Bernard Aboba
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joseph Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joseph Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joseph Touch
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Fernando Gont
[arch-d] Is IPv6 End-to-End? R.I.P. Architecture?… Guntur Wiseno Putra
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Robert Raszuk
[arch-d] Is IPv6 End-to-End? R.I.P. Architecture?… Guntur Wiseno Putra
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Phillip Hallam-Baker
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Phillip Hallam-Baker
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Tom Herbert
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joseph Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joseph Touch
Re: [arch-d] Is IPv6 End-to-End? R.I.P. Architect… Andrew Alston
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Joseph Touch
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Andrew Alston
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
Re: [arch-d] [Int-area] Is IPv6 End-to-End? R.I.P… Fernando Gont
[arch-d] Is IPv6 End-to-End? R.I.P. Architecture?… Guntur Wiseno Putra