Re: [babel] I-D Action: draft-ietf-babel-v4viav6-00.txt

David Schinazi <> Thu, 08 April 2021 15:55 UTC

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From: David Schinazi <>
Date: Thu, 08 Apr 2021 08:54:44 -0700
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To: Toke Høiland-Jørgensen <>
Cc: Juliusz Chroboczek <>, Donald Eastlake <>, babel-chairs <>, Babel at IETF <>
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Subject: Re: [babel] I-D Action: draft-ietf-babel-v4viav6-00.txt
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On the topic of the ICMP IPv4 source address, I agree with Juliusz.
The specific value of that field is not required for interop, so in the
spirit of Babel specs we shouldn't over-constrain implementations.
Saying that routers need to be able to send ICMPv4 seems like the
right choice here. I would suggest adding some implementation
advice saying that using the same address (e.g. the dummy address
on all routers is simplest but using different addresses can simplify

On the topic of standards/experimental, I think that this specification
matches the maturity required of a proposed standard as defined in
RFC 2026 Section 4.1.1
<>. When RFC 1883
<> was published in 1995,
I don't think that IPv6 had a lot of implementation and deployment
experience. But I don't feel too strongly here, as the consumers of
RFCs generally don't look at the track/category when deciding what
or how to implement.


On Thu, Apr 8, 2021 at 7:22 AM Toke Høiland-Jørgensen <toke=> wrote:

> Juliusz Chroboczek <> writes:
> >> There is one other question in my mind. Does this draft really need to
> >> be Experimental? I would be inclined to target it to Proposed Standard.
> >
> > I'm a little uneasy on this subject.  My personal feeling is that we
> > haven't done our homework on this extension (admittedly my fault), and
> > that we don't have enough implementation and deployment experience to
> > propose it as a standard right now.
> >
> > I'd be delighted if people could disagree.
> Isn't that just a matter of time? I.e., we could adopt it as PS, with
> the expectation that by the time it gets published we will have built
> that experience? Or does there even need to be a final decision about
> the status at adoption time?
> -Toke
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