[trill] Comments on draft-ietf-trill-cmt-00

Donald Eastlake <d3e3e3@gmail.com> Sat, 13 October 2012 15:16 UTC

Return-Path: <d3e3e3@gmail.com>
X-Original-To: trill@ietfa.amsl.com
Delivered-To: trill@ietfa.amsl.com
Received: from localhost (localhost []) by ietfa.amsl.com (Postfix) with ESMTP id 7E23B21F857E for <trill@ietfa.amsl.com>; Sat, 13 Oct 2012 08:16:14 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -103.467
X-Spam-Status: No, score=-103.467 tagged_above=-999 required=5 tests=[AWL=0.132, BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1, USER_IN_WHITELIST=-100]
Received: from mail.ietf.org ([]) by localhost (ietfa.amsl.com []) (amavisd-new, port 10024) with ESMTP id i4iJt3ezGJTb for <trill@ietfa.amsl.com>; Sat, 13 Oct 2012 08:16:14 -0700 (PDT)
Received: from mail-ia0-f172.google.com (mail-ia0-f172.google.com []) by ietfa.amsl.com (Postfix) with ESMTP id F0B7B21F852A for <trill@ietf.org>; Sat, 13 Oct 2012 08:16:13 -0700 (PDT)
Received: by mail-ia0-f172.google.com with SMTP id o25so3144027iad.31 for <trill@ietf.org>; Sat, 13 Oct 2012 08:16:13 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=ME1O3XJt1LipNWEwsLltdfOCQ3tEK+cEG2R4c4nnVIU=; b=Z3GvctWA8reCtTmc9IdG+lvt5GOhNB/z79aZ4stM0SdZqhxzoD1uvQsq/4IWGw3azE 0BAEBPPsgy+Um8jnJH8+9MlurFZU1Pj5kkYx0eGv5KJlvcrf8/8XXfjrGOUiy/2he+/C /hMNSyIPu489qUhI5IV8dlFX01JiUC1ctQ74MJm6o2HcxK/6J/Ixe3qtMNxLm/5UoYbc +Ya+vZ55LYiWLxqydUM6SchIgtNvtonZ1ct4u2Z6FF3DMc4qe5xMWKXnaqqZU4GkYGND ICjT2CsgsneBFfl22v5S48JfnGLLPXq2QjYxPwd7k3+pXG8WMg366wgK00vbfnAHN6Xh XWrw==
Received: by with SMTP id rd6mr4936296igb.0.1350141373676; Sat, 13 Oct 2012 08:16:13 -0700 (PDT)
MIME-Version: 1.0
Received: by with HTTP; Sat, 13 Oct 2012 08:15:53 -0700 (PDT)
From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sat, 13 Oct 2012 11:15:53 -0400
Message-ID: <CAF4+nEFrkrTnKOU72B7Bu+aRfdf7g2pQq6uUQoMADUfcO1DOxQ@mail.gmail.com>
To: trill@ietf.org
Content-Type: text/plain; charset=ISO-8859-1
Subject: [trill] Comments on draft-ietf-trill-cmt-00
X-BeenThere: trill@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: "Developing a hybrid router/bridge." <trill.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/trill>, <mailto:trill-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/trill>
List-Post: <mailto:trill@ietf.org>
List-Help: <mailto:trill-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/trill>, <mailto:trill-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 13 Oct 2012 15:16:14 -0000

There are my personal comments on draft-ietf-trill-cmt-00. I suggest
that after these and the few other comments have been handled, the -01
version be WG Last Called.

- Some acronyms need to be spelled out on first use.

- I think Figure 1 and Figure 2 are a bit muddled and should be
clarified to show separate connections from each RBk to each CEn. It
is also not clear to me why "DRB" occurs in the figures and I think it
should be dropped.

- The draft should be clear that when doing the RPFC for a
multi-destination TRILL Data packet ingressed with a virtual RBridge
nickname, the RPFC must assume that the TRILL Data packet might use
any of the trees that any of the RBk might use.

- The could be problems if a virtual RBridge nickname was taken away
by a real RBridge somewhere else in the campus that is higher priority
to hold a nickname. Perhaps the draft should suggest that virtual
RBridge nicknames are usually configured  and should be held with
maximum priority with with configured or unconfigured priority ranges,
as appropriate...

- I think it should be possible to use the Affinity Sub-TLV to change
the structure of multi-destination distribution trees in places other
than at the edge. So they should be valid as long as they do not
conflict even if the requested child is a real RBridge. But, of
course, the requested child has to be an adjacent RBridge and the
draft should say what it would mean if some RBridge lists, as a
requested child for some tree, its parent in that tree.

 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA