From owner-freebsd-questions@FreeBSD.ORG Mon Jun 21 12:26:35 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ED3F716A4CE for ; Mon, 21 Jun 2004 12:26:35 +0000 (GMT) Received: from outbox.allstream.net (outbox.allstream.net [207.245.244.41]) by mx1.FreeBSD.org (Postfix) with ESMTP id C3DB643D58 for ; Mon, 21 Jun 2004 12:26:35 +0000 (GMT) (envelope-from epilogue@allstream.net) Received: from localhost (mon-pq60-099.dial.allstream.net [216.123.136.99]) by outbox.allstream.net (Allstream MTA) with SMTP id 2108AB4C59; Mon, 21 Jun 2004 08:26:25 -0400 (EDT) Date: Mon, 21 Jun 2004 08:26:17 -0400 From: epilogue@allstream.net To: adrian kok Message-Id: <20040621082617.4a0a5b48@localhost> In-Reply-To: <20040621005632.5241.qmail@web21204.mail.yahoo.com> References: <20040621005632.5241.qmail@web21204.mail.yahoo.com> X-Mailer: Sylpheed version 0.9.11claws (GTK+ 1.2.10; i386-portbld-freebsd4.10) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit cc: questions@freebsd.org Subject: ping command question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 21 Jun 2004 12:26:36 -0000 On Mon, 21 Jun 2004 08:56:32 +0800 (CST) adrian kok wrote: > Hi all > > Do you know why the command "ping" in unix and window > is different? > Not if and how they are different. Perhaps someone else can help out here... > I start from one ISP to ping other ISP > > 1/ If the following result from window, it is good or > not? > lost = 7 within 3 thousand packets > In your results, you'll notice that you lost 7 packets out of over 3500, which translates to a loss of 0%. In internetworking, it is generally normal for the odd packet to get lost along the way (for a variety of reasons). Simply analysing the loss rate is not enough to know if your connection is behaving as it should (1), nor does it help to pinpoint where a problem may be (2). (1) Unless you know the expected latency of the path you're testing, you're not going to get very far. You'll have to read up (books/google) on networking latencies in order to get a better handle on this. (2) Unless you're pinging each hop along the way to your final destination or using traceroute, you're never going to understand where a perceived problem lies. Again, networking books and google are your friends here. HTH, epi > 2/ how do I kow the average ms is good or not? > > 3/ Which one (unix or window) is best for testing? > > Thank you very much for your advice > > Reply from 66.49.4.148: bytes=32 time=99ms TTL=57 > Reply from 66.49.4.148: bytes=32 time=109ms TTL=57 > Reply from 66.49.4.148: bytes=32 time=100ms TTL=57 > Reply from 66.49.4.148: bytes=32 time=95ms TTL=57 > > Ping statistics for 66.49.4.148: > Packets: Sent = 3534, Received = 3527, Lost = 7 > (0% loss), ^^^^^^^ > Approximate round trip times in milli-seconds: > Minimum = 89ms, Maximum = 640ms, Average = 102ms > Control-C > > > - > > > > _______________________________________________________________________ > Do You Yahoo!? > Get your free @yahoo.com.hk address at http://mail.english.yahoo.com.hk > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" >