Re: [mpls] Commenst on draft-akiya-bfd-intervals-03
"Nobo Akiya (nobo)" <nobo@cisco.com> Sun, 02 June 2013 02:27 UTC
Return-Path: <nobo@cisco.com>
X-Original-To: mpls@ietfa.amsl.com
Delivered-To: mpls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A457111E80A2; Sat, 1 Jun 2013 19:27:19 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -10.599
X-Spam-Level:
X-Spam-Status: No, score=-10.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id e3pgLw3WhRkd; Sat, 1 Jun 2013 19:27:14 -0700 (PDT)
Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) by ietfa.amsl.com (Postfix) with ESMTP id A468411E80EF; Sat, 1 Jun 2013 19:27:14 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3581; q=dns/txt; s=iport; t=1370140034; x=1371349634; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=cN6KhN/xqsWvX1FY3eNkN8pixJJLwqmKMF3XBxLtDok=; b=UNUi1+nS1FxU4DaOI9KqEYChSQDsarYCopOAP2wO306C4HlGCezddvCS ngL5QLtvJbjO77mjnbPm/r9lb0F9Z010kAVIsPJB+Q6VX9K4Q+3B5eeIx ItV3roR3P8zA4HtTKsNI293IemeLR/62NVUlDYRj9f8UtT1SF+M/82gXF 0=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AgQFADisqlGtJV2d/2dsb2JhbABZgmghML8DfxZ0giMBAQEEAQEBNzQLDAQCAQgRBAEBAQoUCQcnCxQJCAIEAQ0FCIgFAQu5JwSNWguBETEHBoJxYQOofoMPgXE2
X-IronPort-AV: E=Sophos;i="4.87,786,1363132800"; d="scan'208";a="217474187"
Received: from rcdn-core-6.cisco.com ([173.37.93.157]) by rcdn-iport-1.cisco.com with ESMTP; 02 Jun 2013 02:27:14 +0000
Received: from xhc-rcd-x08.cisco.com (xhc-rcd-x08.cisco.com [173.37.183.82]) by rcdn-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id r522RD3P029063 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Sun, 2 Jun 2013 02:27:13 GMT
Received: from xmb-aln-x01.cisco.com ([fe80::747b:83e1:9755:d453]) by xhc-rcd-x08.cisco.com ([173.37.183.82]) with mapi id 14.02.0318.004; Sat, 1 Jun 2013 21:27:13 -0500
From: "Nobo Akiya (nobo)" <nobo@cisco.com>
To: Marc Binderberger <marc@sniff.de>, Jeffrey Haas <jhaas@pfrc.org>, Sam Aldrin <aldrin.ietf@gmail.com>, "Santiago Alvarez (saalvare)" <saalvare@cisco.com>, Binny Jeshan <binnyjeshan@gmail.com>
Thread-Topic: [mpls] Commenst on draft-akiya-bfd-intervals-03
Thread-Index: Ac3Rh3XM5+9UcfrcQ2S8rX469rwQOQAAVMZQAAy8rAAAAN+FAAAAiuEAAAAzaYAfAr3RgARZDheAAAEjodA=
Date: Sun, 02 Jun 2013 02:27:13 +0000
Message-ID: <CECE764681BE964CBE1DFF78F3CDD3941B67564C@xmb-aln-x01.cisco.com>
References: <4A6CE49E6084B141B15C0713B8993F281BD38595@SJEXCHMB12.corp.ad.broadcom.com> <CC0AACF6-E747-4C99-9ABD-2AAEC437367F@sniff.de> <7347100B5761DC41A166AC17F22DF11201E91E@eusaamb103.ericsson.se> <0C8935EE66D53445A3D3982BD9BE546815573400@xmb-aln-x09.cisco.com> <0C709968-C915-4CDA-98E5-361E67D4C923@gmail.com> <20130510172441.GB12732@pfrc> <20130601223455119054.8703c711@sniff.de>
In-Reply-To: <20130601223455119054.8703c711@sniff.de>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [10.86.240.188]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Cc: "mpls@ietf.org" <mpls@ietf.org>, "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, "pwe3@ietf.org" <pwe3@ietf.org>
Subject: Re: [mpls] Commenst on draft-akiya-bfd-intervals-03
X-BeenThere: mpls@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Multi-Protocol Label Switching WG <mpls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/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: Sun, 02 Jun 2013 02:27:19 -0000
Hello Marc, et al, Before going into "timer negotiation deep dive", it'll be beneficial to define the contents of the informational draft. In addition to set of intervals specified, the document can also describe usefulness in implementation supporting multiples of specified intervals. Such implementations will be able to support large set of intervals, and even larger set when jitter considered. I think the result will be very useful to anybody implementing/operating HW BFD. Once we converge on that, then perhaps we can take up the discussion of whether we need additional standard track draft or not, and with what contents. Regards, Nobo > -----Original Message----- > From: mpls-bounces@ietf.org [mailto:mpls-bounces@ietf.org] On Behalf Of > Marc Binderberger > Sent: Saturday, June 01, 2013 4:35 PM > To: Jeffrey Haas; Sam Aldrin; Santiago Alvarez (saalvare); Binny Jeshan > Cc: mpls@ietf.org; rtg-bfd@ietf.org; pwe3@ietf.org > Subject: Re: [mpls] Commenst on draft-akiya-bfd-intervals-03 > > Hello everyone, > > my apologies for the late reply. Too many things at once :-) > > > It looks like we agree towards an "informal" document. This may be partially > due to a misunderstanding, a "standard" document would define a > minimum set of to-be-supported intervals, it would not forbid to support > additional timer interval values, in my view. Anyway, the goal to improve > interoperability can be reached with "informal" too, so I'm fine. > > > For the split-off of appendix B: I can write a new draft, no problem. > The question is to the BFD list though: do you think we should dive deeper > into the timer negotiation area? If everyone thinks the appendix B is > "obvious" or "trivial" then there is no point for a new document. If > implementors think we better do write down these details and discuss > them - then we have a basis for a new draft :-) > > To quickly explain the problem again: RFC5880 and the Poll sequence > described therein implicitly assume that the peer can accept any timer > value. Thus the Poll sequence is a simple P-bit, F-bit sequence. With > hardware-based implementations we may see a more granular timer > support and the peer can _not_ accept the new interval proposed. More > negotiations would be required to find a commonly supported timer value > (which exists when following the draft's minimum set of values). > Appendix B describes the procedure we propose. > > > Regards, Marc > > > > On Fri, 10 May 2013 13:24:41 -0400, Jeffrey Haas wrote: > > On Mon, Dec 03, 2012 at 11:53:47AM -0800, Sam Aldrin wrote: > >> I echo what Santiago had said in his email. Good to have an > >> informational document and do not support the idea of standardizing > >> the intervals. > > > > Speaking as chair, while I'm not in favor of have a standardized set > > of intervals (the fights such a document would create would be epic), > > I am highly supportive of such a document having informational status. > > > > As a suggestion, there may be two actual documents in such a case: > > - An informational document covering the intervals. > > - A short document, potentially on the standards track, covering the > > procedure by which timers can negotiate to such an interval. This may be > > worth standardizing. (This is covered by Appendix B.) > > > > -- Jeff > _______________________________________________ > mpls mailing list > mpls@ietf.org > https://www.ietf.org/mailman/listinfo/mpls
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Gregory Mirsky
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Santiago Alvarez (saalvare)
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Sam Aldrin
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Marc Binderberger
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Binny Jeshan
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Binny Jeshan
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Jeffrey Haas
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Nobo Akiya (nobo)
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Marc Binderberger
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Nobo Akiya (nobo)
- Re: [mpls] Commenst on draft-akiya-bfd-intervals-… Jeffrey Haas