Re: [Isis-wg] Benoit Claise's No Objection on draft-ietf-isis-sbfd-discriminator-02: (with COMMENT)

"Alvaro Retana (aretana)" <> Wed, 18 November 2015 18:12 UTC

Return-Path: <>
Received: from localhost ( []) by (Postfix) with ESMTP id A6EF91A1A99; Wed, 18 Nov 2015 10:12:08 -0800 (PST)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -15.086
X-Spam-Status: No, score=-15.086 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, RP_MATCHES_RCVD=-0.585, SPF_PASS=-0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id 0Gid68P2rVyD; Wed, 18 Nov 2015 10:12:00 -0800 (PST)
Received: from ( []) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id B21C61A1B2A; Wed, 18 Nov 2015 10:11:59 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple;;; l=1238; q=dns/txt; s=iport; t=1447870319; x=1449079919; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=Swk53WtwKLMoISYn7pYD1bUT9/IzYQRALwSB0b0SLBQ=; b=GkqKCKDvwCWQ+p52dqlcFu12dSVaGd9fiJpGJ/41ywxTzgXvaftqBh5I PKDgmilygEru6XjcP7uz2yUNO2tAXhzev0hSFcy+BV0DOjhOBvt9iW/yp 0MTzt9pjPU01Oi3uaaAd3v9c/niximC9QcsyN3/nh8fzuo/phV5qqLtq9 0=;
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="5.20,313,1444694400"; d="scan'208";a="51778655"
Received: from ([]) by with ESMTP/TLS/DHE-RSA-AES256-SHA; 18 Nov 2015 18:11:58 +0000
Received: from ( []) by (8.14.5/8.14.5) with ESMTP id tAIIBweO002178 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Wed, 18 Nov 2015 18:11:58 GMT
Received: from ( by ( with Microsoft SMTP Server (TLS) id 15.0.1104.5; Wed, 18 Nov 2015 12:11:58 -0600
Received: from ([]) by ([]) with mapi id 15.00.1104.000; Wed, 18 Nov 2015 12:11:58 -0600
From: "Alvaro Retana (aretana)" <>
To: "Les Ginsberg (ginsberg)" <>, "Benoit Claise (bclaise)" <>, The IESG <>
Thread-Topic: [Isis-wg] Benoit Claise's No Objection on draft-ietf-isis-sbfd-discriminator-02: (with COMMENT)
Thread-Index: AQHRIiFB3oT0ZHOz/0u8s9y2YKt7mZ6iDd4wgAAX14A=
Date: Wed, 18 Nov 2015 18:11:58 +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="us-ascii"
Content-ID: <>
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Archived-At: <>
Cc: "" <>, "" <>, "" <>, "" <>, "" <>
Subject: Re: [Isis-wg] Benoit Claise's No Objection on draft-ietf-isis-sbfd-discriminator-02: (with COMMENT)
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: IETF IS-IS working group <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Wed, 18 Nov 2015 18:12:08 -0000

On 11/18/15, 12:47 PM, "Les Ginsberg (ginsberg)" <>


>Neither IS-IS nor OSPF are the "application" here. We are simply the
>transport for an opaque piece of information. It makes no sense to me to
>ask the IGPs to clarify what is an issue between S-BFD and an application.

What you say makes sense.

It also makes sense to me that one could argue that since we're
transporting opaque information we could also include an extra piece of
opaque information to let someone else know what the first piece was for.
Note that I'm offering that scenario just as an example of the fact that
there are at least a couple of potential interpretations.

Because of the language used in the Base S-BFD draft (where it does call
OSPF/IS-IS an "application", [1]), I just want to play it safe and make
sure we're not pointing at each other and that result won't be that no one
does the mapping.




   session.  Allocated S-BFD discriminators may be advertised by
   applications (e.g., OSPF/IS-IS).  Required result is that
   applications, on other network nodes, possess the knowledge of the
   mapping from remote entities to S-BFD discriminators.  The reflector