[mpls] R: Your comment to the draft-boutros-mpls-lsp-ping-ttl-tlv presentation yesterday in the MPLS WG.

"BUSI, ITALO (ITALO)" <italo.busi@alcatel-lucent.com> Tue, 27 July 2010 08:43 UTC

Return-Path: <italo.busi@alcatel-lucent.com>
X-Original-To: mpls@core3.amsl.com
Delivered-To: mpls@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id E26403A6BA4 for <mpls@core3.amsl.com>; Tue, 27 Jul 2010 01:43:41 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.449
X-Spam-Level:
X-Spam-Status: No, score=-3.449 tagged_above=-999 required=5 tests=[AWL=-1.200, BAYES_00=-2.599, HELO_EQ_FR=0.35]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lXRJO9BXKqEI for <mpls@core3.amsl.com>; Tue, 27 Jul 2010 01:43:40 -0700 (PDT)
Received: from smail2.alcatel.fr (smail2.alcatel.fr [64.208.49.57]) by core3.amsl.com (Postfix) with ESMTP id 301DE3A6A1F for <mpls@ietf.org>; Tue, 27 Jul 2010 01:43:38 -0700 (PDT)
Received: from FRMRSSXCHHUB02.dc-m.alcatel-lucent.com (FRMRSSXCHHUB02.dc-m.alcatel-lucent.com [135.120.45.62]) by smail2.alcatel.fr (8.14.3/8.14.3/ICT) with ESMTP id o6R8hogP010129 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NOT); Tue, 27 Jul 2010 10:43:51 +0200
Received: from FRMRSSXCHMBSB1.dc-m.alcatel-lucent.com ([135.120.45.39]) by FRMRSSXCHHUB02.dc-m.alcatel-lucent.com ([135.120.45.62]) with mapi; Tue, 27 Jul 2010 10:43:50 +0200
From: "BUSI, ITALO (ITALO)" <italo.busi@alcatel-lucent.com>
To: Sami Boutros <sboutros@cisco.com>
Date: Tue, 27 Jul 2010 10:43:49 +0200
Thread-Topic: Your comment to the draft-boutros-mpls-lsp-ping-ttl-tlv presentation yesterday in the MPLS WG.
Thread-Index: AcstXu/4DZ4c6/o5RAaRTTTmSWWFQAACNb3g
Message-ID: <15740615FC9674499FBCE797B011623F0C1159D9@FRMRSSXCHMBSB1.dc-m.alcatel-lucent.com>
References: <XFE-SJC-232YoaT0fLG0000004a@xfe-sjc-232.amer.cisco.com>
In-Reply-To: <XFE-SJC-232YoaT0fLG0000004a@xfe-sjc-232.amer.cisco.com>
Accept-Language: it-IT, en-US
Content-Language: it-IT
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
acceptlanguage: it-IT, en-US
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Scanned-By: MIMEDefang 2.64 on 155.132.188.80
Cc: "mpls@ietf.org" <mpls@ietf.org>
Subject: [mpls] R: Your comment to the draft-boutros-mpls-lsp-ping-ttl-tlv presentation yesterday in the MPLS WG.
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Multi-Protocol Label Switching WG <mpls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/mpls>, <mailto:mpls-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mpls>
List-Post: <mailto:mpls@ietf.org>
List-Help: <mailto:mpls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mpls>, <mailto:mpls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 27 Jul 2010 08:43:42 -0000

Sami,

Your reply fully address my concerns ;-)

Thanks, Italo

> -----Messaggio originale-----
> Da: Sami Boutros [mailto:sboutros@cisco.com]
> Inviato: martedì 27 luglio 2010 9.39
> A: BUSI, ITALO (ITALO)
> Cc: mpls@ietf.org
> Oggetto: Your comment to the draft-boutros-mpls-lsp-ping-ttl-tlv
> presentation yesterday in the MPLS WG.
> 
> Hi Italo,
> 
> The draft is about a new LSP Ping TLV that can be used to allow the
> verification of a segment of a MS-PW or a bidir co-routed LSP.
> 
> The mechanisms will be used for LSP Ping on demand CV only, i.e. this
> is not going to be used by all OAM functions.
> 
> Given that, if the # of hops in a given segment change due to FRR,
> then there will either be no reply for the LSP Ping echo request, or
> a reply will come from the wrong node, in either case the user
> issuing the on demand CV can simply re-send the request with the TTL
> TLV specifying the new # of hops.
> 
> Thanks,
> 
> Sami