From owner-freebsd-net@freebsd.org Mon Dec 4 13:49:52 2017 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 248D5DFD44F for ; Mon, 4 Dec 2017 13:49:52 +0000 (UTC) (envelope-from cochard@gmail.com) Received: from mail-ua0-f180.google.com (mail-ua0-f180.google.com [209.85.217.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CE34969089 for ; Mon, 4 Dec 2017 13:49:51 +0000 (UTC) (envelope-from cochard@gmail.com) Received: by mail-ua0-f180.google.com with SMTP id i20so10389963uak.6 for ; Mon, 04 Dec 2017 05:49:51 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=u7IteIMrWa9svJxyyPmc6fSMJVvNbo25YBvbobGwel0=; b=gPC/F3v5pcK/WbofhdVuSTzMRzggrYuQcqP//Qxk7KTLr3v3Ms814Nof145wjPox7c 4ya3vtQt3H6Ik/yPJtca9Od0V4c/MZs0EL8GVBwFV1OTX1AeFjRGM97lbnv6/3m9k7ei +MXd8nxwQ/sseCR1Wjt6NNfHy802U5WAyv++QyPEgDSL5NQZArOQX9btbTdYnGS+o2pG nmiOgk3C2VWV24RMgXsUt8d7/oLXT4T21eTuPk5ja+NJaF+nIX6j8XRwFGTJLVarxy/h j+rmnOYh8Xf018UAzETR3nJlrH24OWrKK5P/VAmUdLr7myNAJCiT5VLPp65mika3wFq1 hpPw== X-Gm-Message-State: AKGB3mIBk2jIoqb0u9qz/LNwIlzhOlyduCrACLTe+CcI88C4dkkNRbvw KGlEN9ObXzhMqGFsy7uSoyY+SvQV X-Google-Smtp-Source: AGs4zMZ70WxA4Za9N4o8MlgKad8laWj76iQRUP9jeR/8VVS1oaR3yMNo7XZpBFKY5XZAUAGiLkdwCg== X-Received: by 10.159.58.72 with SMTP id r8mr11190417uag.138.1512394928105; Mon, 04 Dec 2017 05:42:08 -0800 (PST) Received: from mail-ua0-f171.google.com (mail-ua0-f171.google.com. [209.85.217.171]) by smtp.gmail.com with ESMTPSA id 47sm1978392uag.3.2017.12.04.05.42.06 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 04 Dec 2017 05:42:07 -0800 (PST) Received: by mail-ua0-f171.google.com with SMTP id j14so12424013uag.11 for ; Mon, 04 Dec 2017 05:42:06 -0800 (PST) X-Received: by 10.176.73.146 with SMTP id e18mr11363771uad.117.1512394926514; Mon, 04 Dec 2017 05:42:06 -0800 (PST) MIME-Version: 1.0 Received: by 10.103.139.10 with HTTP; Mon, 4 Dec 2017 05:41:45 -0800 (PST) In-Reply-To: References: From: =?UTF-8?Q?Olivier_Cochard=2DLabb=C3=A9?= Date: Mon, 4 Dec 2017 14:41:45 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: Bidirectional Forwarding Detection To: yar Cc: "freebsd-net@freebsd.org" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 04 Dec 2017 13:49:52 -0000 On Mon, Dec 4, 2017 at 1:53 PM, yar wrote: > Hello All. > > Does FreeBSD support BFD (Bidirectional Forwarding Detection)? > rfc5880, rfc5881 =E2=80=8BHi, BFD is supported (ie: not filtered) by FreeBSD: you just need to use a BFD daemon software. If your question was "Does FreeBSD includes a BFD daemon into base?", the answer is no. Main usage of BFD is to detect network failure between routing peers and give this information to the routing protocol=E2=80=8B. As example, once an OSPF process detect new neighbours, it will sent their IP addresses to the BFD process: Once received, the BFD process will monitor the reachability of these neighbours and will communicate back to the OSPF process if they are not reachable. But I'm not aware of a standard way for an "independent" bfd daemon to communicate between all the routing softwares (bird, FRR, quagga, etc.): This is why they includes their own BFD daemon (like bird). Regards, Olivier