Re: [OSPF] Routing directorate review of draft-ietf-ospf-ospfv3-lsa-extend

"Acee Lindem (acee)" <> Fri, 05 May 2017 20:49 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 54C52128854; Fri, 5 May 2017 13:49:17 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -14.523
X-Spam-Status: No, score=-14.523 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id fqZJICJuolR2; Fri, 5 May 2017 13:49:15 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id A730B1293EC; Fri, 5 May 2017 13:49:15 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple;;; l=1828; q=dns/txt; s=iport; t=1494017355; x=1495226955; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=0Hsv57GV5kg/Eyo1e58t2fzyMW8Q4oC8sf1etPPFziY=; b=IscmRRKJ/ek387+HtL8hWLffvOL3un/mCLd9siUh0PCA4Xp1ifezs4Tw B0IjS5FY/3fzEjEOCn2EbNhDgvAyOssVq8Z8xwneviEK6+ciS6ZmPzdle QjVeDMbEncvXueRJJ6ZSAGo5amDxVrZBP2luBoQUYci+q0xiSnmmkEhZN I=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="5.38,294,1491264000"; d="scan'208";a="422471146"
Received: from ([]) by with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 May 2017 20:49:14 +0000
Received: from ( []) by (8.14.5/8.14.5) with ESMTP id v45KnEK0007312 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Fri, 5 May 2017 20:49:14 GMT
Received: from ( by ( with Microsoft SMTP Server (TLS) id 15.0.1210.3; Fri, 5 May 2017 16:49:14 -0400
Received: from ([]) by ([]) with mapi id 15.00.1210.000; Fri, 5 May 2017 16:49:13 -0400
From: "Acee Lindem (acee)" <>
To: "IJsbrand Wijnands (iwijnand)" <>, "" <>
CC: "" <>, OSPF WG List <>, Routing Directorate <>
Thread-Topic: Routing directorate review of draft-ietf-ospf-ospfv3-lsa-extend
Thread-Index: AQHSxaN/PlJT3AHjtECePp6ckjGnY6HmNsqA
Date: Fri, 05 May 2017 20:49:13 +0000
Message-ID: <>
References: <>
In-Reply-To: <>
Accept-Language: en-US
Content-Language: en-US
x-ms-exchange-messagesentrepresentingtype: 1
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: []
Content-Type: text/plain; charset="utf-8"
Content-ID: <>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
Archived-At: <>
Subject: Re: [OSPF] Routing directorate review of draft-ietf-ospf-ospfv3-lsa-extend
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: The Official IETF OSPG WG Mailing List <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Fri, 05 May 2017 20:49:17 -0000

+OSPF, Routing Directorate

Thanks for the review Ice!

On 5/5/17, 9:28 AM, "IJsbrand Wijnands (iwijnand)" <> wrote:

>Hi All,
>I have been selected to do a routing directorate QA review of this draft.
>This draft proposes a new addressing (TLV) format to more easily allow
>additional information to be added as part of a particular LSA. Overall,
>well written, easy to understand what the objective is for this draft.
>Comments and Questions:
>This looks like a pretty radical change to the OSPFv3 spec. I would
>almost argue to call it OSPFv4..

Experience has proved that new versions are slow to deploy. OSPFv3 is well
positioned to evolve to the next generation IGP.

> Its very unfortunate there are no ‘reserved’ fields in RFC5340 that
>would allow you keep the existing LSA’s format and have some way to
>extend it differently. The TLV approach look good, I can’t see a better
>way to achieve the goal.

No - we struggled with backward compatibility and, due to complexity, went
with with area by area migration as opposed to migration with concurrent
usage of both regular and extended LSAs.

>Minor Issues and Nits: