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Re: Reference based Routing (RbR)

Brian E Carpenter <brian.e.carpenter@gmail.com> Sun, 24 May 2020 21:10 UTC

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Subject: Re: Reference based Routing (RbR)
To: ipv6@ietf.org
References: <82165E20-884F-467B-B364-1B0A8B84A38A@tony.li> <05B3C66C-5CB2-4871-8AF9-52517C56866C@employees.org> <CAOj+MMHv=Rw37DNTFXZgVTN=BbvLBjpPkNav5aDG=s1u9yJSxw@mail.gmail.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Mon, 25 May 2020 09:10:43 +1200
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On 25-May-20 08:56, Robert Raszuk wrote:
> 
> Right Ole - this is exactly the scope here. 

That's what https://tools.ietf.org/html/rfc6437#section-4 calls "Flow State Establishment". But there are still some constraints on the value of the label.

Unless of course the IETF embraces limited-domain architectures and standards...

    Brian

> 
> The original flow label will remain untouched in the inner header anyway even if this is of some use outside of limited domain. 
> 
> However as we discussed this is just a possible placeholder option. At this very moment considering the full picture I am more inclined to suggest use of least significant bits of the DA. 
> 
> But completely open for suggestions and guidance 
> 
> Best,
> R.
> 
> 
> On Sun, May 24, 2020 at 10:50 PM Ole Troan <otroan@employees.org <mailto:otroan@employees.org>> wrote:
> 
> 
> 
>     > On 24 May 2020, at 20:10, tony.li@tony.li <mailto:tony.li@tony.li> wrote:
>     >
>     > Is someone actually using the flow label?  As far as I know it’s wholly unused.
> 
>     Inside a limited domain using encapsulation, which is what all these solutions cover, you could likely use the flow label as a “path tag”.
>     If there is much benefit in using an IPv6 header for the encapsulation is another matter.
> 
>     Ole
> 
> 
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