Re: [Idr] WG LC on draft-ietf-idr-rpd-05.txt (7/15 to 7/29/2020)

"Ketan Talaulikar (ketant)" <ketant@cisco.com> Thu, 23 July 2020 10:02 UTC

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From: "Ketan Talaulikar (ketant)" <ketant@cisco.com>
To: Robert Raszuk <robert@raszuk.net>, Susan Hares <shares@ndzh.com>
CC: "idr@ietf. org" <idr@ietf.org>
Thread-Topic: [Idr] WG LC on draft-ietf-idr-rpd-05.txt (7/15 to 7/29/2020)
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Subject: Re: [Idr] WG LC on draft-ietf-idr-rpd-05.txt (7/15 to 7/29/2020)
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+1 and I also agree on Jakob’s comments/discussion on a parallel thread.

The individual version of this draft was called draft-li-idr-flowspec-rpd. When it came up for WG adoption, perhaps most people thought it was yet another Flowspec extension and did not have a close look at it.

The draft got adopted in Nov 2019 and since then, there has hardly been any change for it (other than IANA allocations update) : https://www.ietf.org/rfcdiff?url1=draft-ietf-idr-rpd-00&url2=draft-ietf-idr-rpd-05

I am not sure if this document has received sufficient review and inputs from the WG over the recent 9 months of its life as a WG document. Those provided by Robert previously seem not to have been incorporated?

Not sure if I missed implementation reports or some operator feedback on this.

Some more/other comments on why I believe this draft is not a good idea:


  *   How does the controller or provisioning entity know the status of the Route Policy provisioning on the target router. Even that it was successfully propagated to it and installed on it?
  *   Seems like one can have multiple policies advertised for a single peer/neighbor? How would they be handled?
  *   The draft has support for IPv4 and IPv6 prefix list and AS regex. What other route policy tools does the WG expect to extend in further drafts? Perhaps we end up with yet another boatload of extension drafts for BGP for RPD?

We have Route Policy yang model defined at the IETF for provisioning of route policies that provide better and more comprehensive solution than the proposal in this document. That approach is also very robust from operational perspective. We don’t need to be putting this into BGP protocol.

In summary, my suggestion would also be not proceed further on this document.

Thanks,
Ketan

From: Idr <idr-bounces@ietf.org> On Behalf Of Robert Raszuk
Sent: 17 July 2020 18:38
To: Susan Hares <shares@ndzh.com>
Cc: idr@ietf. org <idr@ietf.org>
Subject: Re: [Idr] WG LC on draft-ietf-idr-rpd-05.txt (7/15 to 7/29/2020)

Dear IDR WG,

As discussed previously on the list I strongly object to proceed with this draft any further.

While I am as others quite sceptical about distributing more configuration over BGP this can be said to be debatable especially for p2mp applications.

However including peer's IP address in the NLRI to which given policy applies goes completely AGAINST BGP spray principle of p2mp information distribution. Adding such extension to BGP can only deteriorate the protocol further. It is not a fit in p2mp protocol to by definition use it as p2p transport channel.

The prefix 0 which is in the draft is not the solution to the above problem.

Moreover wide community ATOM also can already contain that peer's address so placing it in the NLRI of MP_REACH is not needed at all.

To the specific questions asked:

Ad 1) No.
Ad 2) No.
Ad 3) No..
Ad 4) No.
Ad 5) Yes.

Kind regards,
R.


On Wed, Jul 15, 2020 at 3:11 PM Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>> wrote:
This begins a 2 week WG LC on draft-ietf-idr-rpd
from 7/15 to 7/29/2020.  You can obtain this draft at:
https://datatracker.ietf.org/doc/draft-ietf-idr-rpd/

This draft defines a new AFI/SAFI and new atoms
for the Wide Communities.  This WG LC has been delayed
as I waited for a resubmission of the Wide Communities draft.
I had hoped to do these 2 WG LC in parallel.

I’ve not received the Wide Communities draft, but we will
start this WGLC to provide feedback to the authors.
We may have to run a short follow-up to this WG LC
If there are changes to the Wide Communities draft during
Its WG LC.

There is an IPR statement on this draft.

In your responses please answer the following questions:

1) Do you feel this draft has an solution that is acceptable
   With the IPR as a WG RFC?

2) Do you feel this draft is ready to publish?

3) Do you know of implementations of this draft?

4) Do you know of deployments of this draft?
If so, is this feature useful in the deploy ments.

5) Do you feel that Wide Communities is ready for
Publication?

Cheerily, Susan Hares
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