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Re: Other use cases for header insertion (was Re: Header Insertion and TI-FA)

Stewart Bryant <stewart.bryant@gmail.com> Wed, 13 May 2020 09:42 UTC

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Subject: Re: Other use cases for header insertion (was Re: Header Insertion and TI-FA)
From: Stewart Bryant <stewart.bryant@gmail.com>
In-Reply-To: <f4ab18fe-3321-fc1e-5cdb-6a3aa5e5993f@gmail.com>
Date: Wed, 13 May 2020 10:42:47 +0100
Cc: Stewart Bryant <stewart.bryant@gmail.com>, Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, Robert Raszuk <robert@raszuk.net>, 6man <6man@ietf.org>
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> On 12 May 2020, at 21:29, Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
> 
> On 13-May-20 02:56, Stewart Bryant wrote:
>> It would also mean a new Ethertype, and I am sure that as we think about it other issues will come up.
>> 
>> … but I am sure that you are not the only one wondering the same thing.
> 
> Yes, there would be a lot of competition if there was a *serious* proposal
> to add a new protocol number. Maybe we should make the first provision of
> IPv7 that there should be a sub-version number.
> 
> Sigh.
> 
>   Brian
> 

The big questions for me is the extent to which it should be self describing vis described by reference to context, and the extent to which it should be both the UNI and the network protocol.

Like it or hate it look how powerful MPLS became through the generality that a 20bit pointer to a procedure in the NPU and an arbitrary stack provided.

The self describing nature of IP is both an advantage and a significant limitation to its future extensibility.

So I am not sure if we need a sub-version or not, but we do need to look at building generality in from the beginning.

- Stewart

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