Re: [Sidrops] ASPA false leak
Randy Bush <randy@psg.com> Wed, 16 October 2019 01:45 UTC
Return-Path: <randy@psg.com>
X-Original-To: sidrops@ietfa.amsl.com
Delivered-To: sidrops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 37B69120843 for <sidrops@ietfa.amsl.com>; Tue, 15 Oct 2019 18:45:48 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.9
X-Spam-Level:
X-Spam-Status: No, score=-6.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
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 xHkegHZ-_uJO for <sidrops@ietfa.amsl.com>; Tue, 15 Oct 2019 18:45:47 -0700 (PDT)
Received: from ran.psg.com (ran.psg.com [IPv6:2001:418:8006::18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E51E5120819 for <sidrops@ietf.org>; Tue, 15 Oct 2019 18:45:46 -0700 (PDT)
Received: from localhost ([127.0.0.1] helo=ryuu.rg.net) by ran.psg.com with esmtp (Exim 4.90_1) (envelope-from <randy@psg.com>) id 1iKYNl-0008JC-1W; Wed, 16 Oct 2019 01:45:45 +0000
Date: Wed, 16 Oct 2019 03:45:44 +0200
Message-ID: <m2y2xlsbsn.wl-randy@psg.com>
From: Randy Bush <randy@psg.com>
To: Jakob Heitz <jheitz@cisco.com>
Cc: SIDR Operations WG <sidrops@ietf.org>
In-Reply-To: <BN8PR11MB37463090DCE5AF62C9D8B9E5C0930@BN8PR11MB3746.namprd11.prod.outlook.com>
References: <BN8PR11MB37463090DCE5AF62C9D8B9E5C0930@BN8PR11MB3746.namprd11.prod.outlook.com>
User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/26.2 Mule/6.0 (HANACHIRUSATO)
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset="US-ASCII"
Archived-At: <https://mailarchive.ietf.org/arch/msg/sidrops/Gtt6QhX_G1I39F1-ykZQ19qxkS0>
Subject: Re: [Sidrops] ASPA false leak
X-BeenThere: sidrops@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: A list for the SIDR Operations WG <sidrops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/sidrops>, <mailto:sidrops-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/sidrops/>
List-Post: <mailto:sidrops@ietf.org>
List-Help: <mailto:sidrops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/sidrops>, <mailto:sidrops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Oct 2019 01:45:49 -0000
> Consider the topology: > > AS5 AS3 > \ / \ > \ / \ > AS4 AS2 > \ / > \ / > AS1 > > AS1 has providers AS2 and AS4. > AS2 has provider AS3. > AS4 has providers AS3 and AS5. > > AS5 receives a route with AS-path (4 3 2 1). > ASPA would declare that AS4 leaked the route from AS3 to AS5. > However, AS4 is an authorized provider for AS1. > Even though AS4 has a path to AS1, it chose to use an alternative > valid path to reach AS1. and that alternate path sure looks a lot like a route leak. randy
- [Sidrops] ASPA false leak Jakob Heitz (jheitz)
- Re: [Sidrops] ASPA false leak Randy Bush
- Re: [Sidrops] ASPA false leak Jakob Heitz (jheitz)
- Re: [Sidrops] ASPA false leak Ben Maddison
- Re: [Sidrops] ASPA false leak Randy Bush
- Re: [Sidrops] ASPA false leak Alexander Azimov
- Re: [Sidrops] ASPA false leak Jakob Heitz (jheitz)
- Re: [Sidrops] ASPA false leak Randy Bush
- Re: [Sidrops] ASPA false leak Ben Maddison