Re: [Idr] IETF LC for IDR-ish document <draft-ietf-grow-bgp-reject-05.txt> (Default EBGP Route Propagation Behavior Without Policies) to Proposed Standard

Job Snijders <job@instituut.net> Mon, 24 April 2017 19:08 UTC

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Date: Mon, 24 Apr 2017 15:07:53 -0400
From: Job Snijders <job@instituut.net>
To: Christopher Morrow <morrowc.lists@gmail.com>
Cc: "Acee Lindem (acee)" <acee@cisco.com>, Hares Susan <shares@ndzh.com>, idr wg <idr@ietf.org>
Message-ID: <20170424190753.632y3wz37p32s6uh@Vurt.local>
References: <D4E812E8-AA7B-4EA2-A0AC-034AA8922306@juniper.net> <abe393d3-d1e4-7841-4620-38dab751765b@cisco.com> <CA+b+ERnRz8BEO3mb1fnsDPoiL6Wxjdfw9vQPbyODNEa+xCJdnw@mail.gmail.com> <D51D67E4.A9782%acee@cisco.com> <AF07526F-F08B-4084-937B-A9A2D2DD2813@juniper.net> <D51D6AD2.A9795%acee@cisco.com> <CAL9jLaa1UQ5A1FwRKVw5RJCBQO+0j0BW4vUNaPXHB0_JB0j76Q@mail.gmail.com>
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Subject: Re: [Idr] IETF LC for IDR-ish document <draft-ietf-grow-bgp-reject-05.txt> (Default EBGP Route Propagation Behavior Without Policies) to Proposed Standard
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On Mon, Apr 24, 2017 at 02:58:58PM -0400, Christopher Morrow wrote:
> On Wed, Apr 19, 2017 at 7:30 PM, Acee Lindem (acee) <acee@cisco.com>; wrote:
> > On 4/19/17, 7:25 PM, "John Scudder" <jgs@juniper.net>; wrote:
> >
> > >(As an individual contributor)
> > >
> > >On Apr 19, 2017, at 7:18 PM, Acee Lindem (acee) <acee@cisco.com>; wrote:
> > >> the draft is conspicuously missing a “Backwards Compatibility” section.
> > >
> > >Seriously? "Backwards compatibility" in this case is "configure your
> > >router to do what it used to", right? We need a section to say that?
> >
> > Anytime one proposes to change the default behavior of a decades old
> > protocol to be more restrictive, I would expect this to be discussed.
> >
> 
> a few times in this discussion people say: "the protocol", but the draft
> doesn't propose changing the protocol, it proposes that implementations
> stop being wide-open with respect to send/receive conditioning/filtering.
> 
> There's no default behavior change in the protocol (which I think doesn't
> really talk about filtering prefixes at all, not in the sense of
> 'prefix-list foo in' anyway).

Alvaro suggested to update the 4271 text to give clear guidance to
implementors on how this works.

A preview of the forth coming new version of the document is available
here:

    http://htmlpreview.github.io/?https://github.com/jaredmauch/draft-mauch-bgp-reject/blob/alvaro/draft-ietf-grow-bgp-reject-06-from-5.diff.html

We'll be posting a new version tomorrow or so.

Kind regards,

Job