Re: [Bier] draft-ietf-bier-ipv6-requirements-09

[Tony Przygienda <[e-mail]>]

On Thu, Nov 26, 2020 at 10:43 AM Adrian Farrel <[e-mail]> wrote:

> Thanks Tony,
>
>
>
> I’m going to assume that, despite the fact that I’m a fairly fresh person
> to this discussion, I don’t count as someone whose utterances (so far) have
> been discourteous. I’m certainly not supporting any specific solution.
>

absolutely not, the guilty parties know who they are :-/


>
> The thing I pick out from your extensive reply is “packet the temptation
> to throw packet multiple hops (violating the specs even if we write them
> ‘you shall never do that’ ;-) will be irresistible.”
>
>
>

well, people will ;-) and we have to talk about it as I said


> That leaves us with a choice:
>
>    - Recognise that the irresistible will happen and factor it in
>
>
yepp


>
>    -
>    - Determine that multi-hop IP is not supported and factor it out
>
> “Factored in” means, of course, understanding that the v6-carrying-BIER
> packets must be able to pass through transit routers with as much
> functionality as possible.
>
> “Factored out” means either not doing anything to support it, and not
> caring if it crashes and burns, or deliberately engineering that a legacy
> transit router would gracefully drop or reject the packets.
>
>
>
well, "as much functionality" is debatable, "it must pass by the routers"
is not

thanks, Adrian, good take

-- tony