Return-Path: X-Original-To: mpls@ietfa.amsl.com Delivered-To: mpls@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AEB8D1A88D9 for ; Tue, 3 Nov 2015 17:38:11 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.209 X-Spam-Level: X-Spam-Status: No, score=-4.209 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ngaa6D0LooOE for ; Tue, 3 Nov 2015 17:38:10 -0800 (PST) Received: from mail-gw2-out.broadcom.com (mail-gw2-out.broadcom.com [216.31.210.63]) by ietfa.amsl.com (Postfix) with ESMTP id C39401A88C6 for ; Tue, 3 Nov 2015 17:38:09 -0800 (PST) X-IronPort-AV: E=Sophos; i="5.20,240,1444719600"; d="scan'208,217"; a="79626654" Received: from irvexchcas06.broadcom.com (HELO IRVEXCHCAS06.corp.ad.broadcom.com) ([10.9.208.53]) by mail-gw2-out.broadcom.com with ESMTP; 03 Nov 2015 18:09:38 -0800 Received: from SJEXCHCAS05.corp.ad.broadcom.com (10.16.203.12) by IRVEXCHCAS06.corp.ad.broadcom.com (10.9.208.53) with Microsoft SMTP Server (TLS) id 14.3.235.1; Tue, 3 Nov 2015 17:38:09 -0800 Received: from SJEXCHMB12.corp.ad.broadcom.com ([fe80::bc15:c1e1:c29a:36f7]) by SJEXCHCAS05.corp.ad.broadcom.com ([::1]) with mapi id 14.03.0235.001; Tue, 3 Nov 2015 17:38:09 -0800 From: Shahram Davari To: Shahram Davari , "mpls@ietf.org" Thread-Topic: draft-saad-lsp-instant-install-rsvpte Thread-Index: AdEWoWQZpk+yPXHhSEG7jWjlcIIDpw== Date: Wed, 4 Nov 2015 01:38:08 +0000 Message-ID: <4A6CE49E6084B141B15C0713B8993F283204F837@SJEXCHMB12.corp.ad.broadcom.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.16.203.100] Content-Type: multipart/alternative; boundary="_000_4A6CE49E6084B141B15C0713B8993F283204F837SJEXCHMB12corpa_" MIME-Version: 1.0 Archived-At: Subject: [mpls] draft-saad-lsp-instant-install-rsvpte X-BeenThere: mpls@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Multi-Protocol Label Switching WG List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Nov 2015 01:38:11 -0000 --_000_4A6CE49E6084B141B15C0713B8993F283204F837SJEXCHMB12corpa_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sorry, Just changed the subject to correct Draft. Hi, Although the problem the draft is trying to solve is a legitimate problem, = but the solution has a number of issues: 1) It requires ingress LER to impose a stack of labels that is potenti= ally large. Existing HW can't currently support this and therefore this dra= ft requires replacing all LER HW 2) The solution requires all intermediate LSRs to support this new RSV= P-TE extension. 3) The QoS is not guaranteed. Since there is no correlation between ul= timate LSP and the DLL Stack. Since potentially many LSPs may be required = to go through the same path and they will all use the same DLL stack. 4) Switching multiple times to final LSP causes in flight packet drops= and out of order delivery 5) In a large MPLS network, There is no guarantee that the RESV messag= e comes back with low delay. Thx Shahram --_000_4A6CE49E6084B141B15C0713B8993F283204F837SJEXCHMB12corpa_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Sorry, Just changed the= subject to correct Draft.<= /p>

 

Hi,


Although the problem the draft is trying to solve is a legitimate problem, = but the solution has a number of issues:

 

1)      It requires ingress LER to impose a stack of labels= that is potentially large. Existing HW can’t currently support this = and therefore this draft requires replacing all LER HW

2)      The solution requires all intermediate LSRs to supp= ort this new RSVP-TE extension.

3)      The QoS is not guaranteed. Since there is no correl= ation between ultimate LSP and the  DLL Stack. Since potentially many = LSPs may be required to go through the same path and they will all use the = same DLL stack.

4)      Switching multiple times to final LSP causes in fli= ght packet drops and out of order delivery

5)      In a large MPLS network, There is no guarantee that= the RESV message comes back with low delay.

 

 

Thx
Shahram

 

 

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