From owner-freebsd-net@FreeBSD.ORG Sat Jan 11 17:01:00 2014 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id AB2156BB for ; Sat, 11 Jan 2014 17:01:00 +0000 (UTC) Received: from bizet.nethelp.no (bizet.nethelp.no [195.1.209.33]) by mx1.freebsd.org (Postfix) with SMTP id EF74410EB for ; Sat, 11 Jan 2014 17:00:59 +0000 (UTC) Received: (qmail 8528 invoked from network); 11 Jan 2014 17:00:57 -0000 Received: from bizet.nethelp.no (HELO localhost) (195.1.209.33) by bizet.nethelp.no with SMTP; 11 Jan 2014 17:00:57 -0000 Date: Sat, 11 Jan 2014 18:00:57 +0100 (CET) Message-Id: <20140111.180057.78714603.sthaug@nethelp.no> To: mp39590@gmail.com Subject: Re: Merge ping+ping6 and traceroue+traceroute6 to single utilities? From: sthaug@nethelp.no In-Reply-To: <20140111164047.GA97150@edge.bac.lab> References: <1063008459.20140111160525@serebryakov.spb.ru> <20140111164047.GA97150@edge.bac.lab> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 11 Jan 2014 17:01:00 -0000 > >>From an operator's point of view: unlike ordinary network applications like > remote login tools, we are usually aware of address family when using network > management tools. We do not just want to know the reachability to the host, > but want to know the reachability to the host via a particular network protocol > such as IPv6. Thus, even if we had a unified ping(8) command for both IPv4 and > IPv6, we would usually type a -6 or -4 option (or something like those) to > specify the particular address family. This essentially means that we have two > different commands. Disagree. As I showed in my previous message, *only* in the case of a name with both A and AAAA records is this necessary. I use unified ping and traceroute on JunOS daily. It's a blessing not to have to specify the address family. Steinar Haug, Nethelp consulting, sthaug@nethelp.no