From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-x436.google.com (mail-wr1-x436.google.com [IPv6:2a00:1450:4864:20::436]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id CD2493B2A4; Wed, 22 Feb 2023 13:35:08 -0500 (EST) Received: by mail-wr1-x436.google.com with SMTP id j2so8564685wrh.9; Wed, 22 Feb 2023 10:35:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=J+KNXh1sOwuvXq8W8IB4XyH7TLCLrDnNVZ6OYAW6cv0=; b=iDUPmg3zw0JWa+DxYYm95uzN9R0Ez3h2sfQmbvHXCStEFbU8lmjdAGoopzcKlxxia5 +zuVqdFX4g5/r1e77qlMVdep25303+t/VehZxslyjzOMulUUnMntIc8T0R1nAodbySII 5j0pNxB7XW/Wkbl9iCQ/zJadTYHORpohBw9H2nYIA/cXvVY+DKFHuW6sIj1k4LReujk9 HhEzqkUaaSeYCEJNIP/rBL3oFjukWaP3H6c36fOTtMdt5QR6jCDSjvNeg0OG8rtx7r0+ kdJcaC5P3g9NceoByTO0nFb0psDdiay3b4+1cYSEi0kbFBXvT+R+1sbJUfK/3TVpAaat QXEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=J+KNXh1sOwuvXq8W8IB4XyH7TLCLrDnNVZ6OYAW6cv0=; b=TurydDM4VnWT+hwyLATCvoGwk77Zjk1Ym7usB2az6S58kAKsPwQVXXjnNODlFyaQDA CTnUIOIw6/0oWuL2gEvjwiZKkFXkzu6FSAaEk+Lc7KWIZi273p/y3G5FDaz9HwjiQQhQ FMgXadmAyQVD0SK9VQrx3ySzcFKjyHXlfIRc9OpL4pdbawJEQeufy9b3tqVXtDwcnN51 p7kLxMD3/pjKZrg8wC6MNnuwYqjV9Sbe9CP40MGpFYFymb2UoAwuAwSDlu/uMhtkvMi4 QCU2KNS5fMaJ1ejt+wGJdGSA1xV0iv0Oprwx7fyGRBH+z7HlpXgfKPq9fkbQOUM14ycf IHRg== X-Gm-Message-State: AO0yUKXxfarLRLWEEqV0RHO3quXKoX3e1G4vaWIMtpsOpwHgmnW2n5dS uiBMaVrlIarPmbBgGUQjICGNfl0wA//2n8l/0T9jLDD+ X-Google-Smtp-Source: AK7set+PCHVPhkWD/EiMWNo1Cd9T7AsnPdisVgpKxdzMUkYIpBTfXcQWhQAw8vFghwpPcEVNgWVzii+YTR0Bl3FUKV0= X-Received: by 2002:a5d:4fc8:0:b0:2c5:6459:4ebd with SMTP id h8-20020a5d4fc8000000b002c564594ebdmr110691wrw.46.1677090907233; Wed, 22 Feb 2023 10:35:07 -0800 (PST) MIME-Version: 1.0 References: <8541b7f0-9eeb-ebec-a6ee-6d81bc9c9c65@hs-augsburg.de> In-Reply-To: <8541b7f0-9eeb-ebec-a6ee-6d81bc9c9c65@hs-augsburg.de> From: Dave Taht Date: Wed, 22 Feb 2023 10:34:55 -0800 Message-ID: To: libreqos , bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [LibreQoS] Fwd: Reverse Traceroute X-BeenThere: libreqos@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Many ISPs need the kinds of quality shaping cake can do List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Feb 2023 18:35:08 -0000 ---------- Forwarded message --------- From: Rolf Winter Date: Wed, Feb 22, 2023 at 5:11 AM Subject: Reverse Traceroute To: Dear NANOG folks, As you know, traceroute is unable to enumerate routers on the reverse path. Given that paths through the public internet are usually asymmetric, knowing the reverse path would be beneficial e.g. for troubleshooting purposes (https://youtu.be/L0RUI5kHzEQ?t=3D2312). We have implemented a reverse traceroute tool (https://github.com/hsanet/reverse-traceroute), both client and server for both IPv4 and IPv6. We are also in the process of specifying the protocol at the IETF (https://datatracker.ietf.org/doc/html/draft-heiwin-intarea-reverse-tracero= ute). We also gave a talk on reverse traceroute at DENOG14 (https://youtu.be/Y7NtqLEtgjU). If you would like to play with reverse traceroute, the easiest option is to work with the client and use one of the public server instances (https://github.com/HSAnet/reverse-traceroute/blob/main/ENDPOINTS). If you would be willing to host a public server instance yourself, please reach out to us. Also, if you find this work useful, please start discussing the work at the IntArea WG at the IETF. If you have any questions or comments, just drop us a line, file an issue on github and/or use the IntArea mailing list. Thanks a bunch, Rolf --=20 A pithy note on VOQs vs SQM: https://blog.cerowrt.org/post/juniper/ Dave T=C3=A4ht CEO, TekLibre, LLC