Subject: Re: [mpls] I-D Action: draft-ietf-mpls-rmr-00.txt

From: Robert Raszuk <[email-masked]>
Date: Wed, 2 Dec 2015 10:39:10 +0100

Hi Kireeti,

As to the core problem which the below draft attempts to solve (ring
topologies) can you please explain any advantage of introducing such heavy
additional complexity into both control and data plane when the problem has
been already solved over a decade ago ?

Moreover it has been shipping in commercial implementations of at least one
major vendor. It is called Remote Loop-Free Alternate (LFA) Fast Reroute
(FRR).

Notice also that Remote LFAs is an IETF Stadards Track formal RFC #7490
which your draft does not even reference.

https://tools.ietf.org/html/rfc7490

Also as you may observe Remote LFA already uses either MPLS transport with
vanilla LDP or pure IP transport and its configuration is few simple lines
of the cli.

Aren't we in general suppose to optimize opex a bit these days and use
existing technologies rather then reinventing the wheel over and over :) ?

Best,
R.

On Mon, Nov 2, 2015 at 8:04 AM, <[email-masked]> wrote:

>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>  This draft is a work item of the Multiprotocol Label Switching Working
> Group of the IETF.
>
>         Title           : Resilient MPLS Rings
>         Authors         : Kireeti Kompella
>                           Luis M. Contreras
>         Filename        : draft-ietf-mpls-rmr-00.txt
>         Pages           : 14
>         Date            : 2015-11-01
>
> Abstract:
>    This document describes the use of the MPLS control and data planes
>    on ring topologies.  It describes the special nature of rings, and
>    proceeds to show how MPLS can be effectively used in such topologies.
>    It describes how MPLS rings are configured, auto-discovered and
>    signaled, as well as how the data plane works.  Companion documents
>    describe the details of discovery and signaling for specific
>    protocols.
>
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-mpls-rmr/
>
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-mpls-rmr-00
>
>
> Please note that it may take a couple of minutes from the time of
> submission
> until the htmlized version and diff are available at tools.ietf.org.
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
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