Re: [v6ops] discussion of transition technologies

Fred Baker <fredbaker.ietf@gmail.com> Mon, 22 January 2018 17:29 UTC

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From: Fred Baker <fredbaker.ietf@gmail.com>
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Date: Mon, 22 Jan 2018 09:29:46 -0800
In-Reply-To: <E1F0B499-3C4B-4B80-A23E-201B1FCDBC66@jisc.ac.uk>
Cc: Sander Steffann <sander@steffann.nl>, "v6ops@ietf.org WG" <v6ops@ietf.org>
To: Tim Chown <Tim.Chown@jisc.ac.uk>
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Subject: Re: [v6ops] discussion of transition technologies
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On Jan 22, 2018, at 2:46 AM, Tim Chown <Tim.Chown@jisc.ac.uk> wrote:
> So what translation mechanisms are you recommending "above the IP layer" ?

The one that comes quickly to mind is a load balancer that terminates one transport connection and relays data to another. It's a transport layer gateway, and so not translation in the SIIT sense of the word. It also has interesting ramifications for ICMP and so on - they don't follow the transport connection and so are invisible to it through such a gateway. The one place that seems to be a headache is with location-based or customer-based services - load balancers will often insert an http header letting the ultimate recipient know the address of its ultimate peer in the session. That, of course, has ramifications for https etc, which might be just as happy to carry the data as some form of login cookie or REST data element.