On Thu, Sep 5, 2019 at 6:35 AM Ole Troan <otr...@employees.org> wrote:
>
> Joel,
>
> > Part of the reason we write restrictions and requirements into RFCs is so 
> > that we do not have to repeat the arguments.
> >
> > If the proponents of the insertion have arguments for why it is now okay, 
> > they need to make those arguments.  And they need to make sure that the 
> > discussion is taken to the relevant working groups.  The burden should not 
> > be on those who are asking that attention be paid to existing RFCs.
>
> As far as I know, but I'm trying to stay away from the actual proposals and 
> argue this generally, no-one is proposing to update the RFC8200 header 
> insertion text.
> What people are proposing are for specific domains. And given that, I believe 
> people need to argue the technical merits of those specific proposals.

Ole,

I don't believe the requirements of RFC8200 were ever intended to be
conditional based on the runtime environment. Either it's IPv6 or it's
not. I would be opposed to bifurcating standard protocols so that they
work differently in the open Internet versus a limited domain.

> As opposed to throwing the "law book" around.

This is isn't just throwing the law book around. Consider that
extension header insertion was proposed in
draft-voyer-6man-extension-header-insertion and there was much
discussion on the list. There were a number of very specific arguments
articulated why this is not robust and how this can break other
protocols. I don't see that the proponents of haven't provided counter
arguments. So I believe that the current consensus is that EH
insertion is not allowed, but that 's not just because RFC8200 says so
but also because there are material reasons why it's a bad idea. This
doesn't preclude the possibility of the EH insertion could be accepted
some day, but I don't see how that can happen unless the arguments
against it are addressed.

Tom


>

> Best regards,
> Ole
>
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