From owner-freebsd-net@FreeBSD.ORG Tue Jul 12 14:00:17 2005 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3F6A816A41C for ; Tue, 12 Jul 2005 14:00:17 +0000 (GMT) (envelope-from rik@cronyx.ru) Received: from hanoi.cronyx.ru (hanoi.cronyx.ru [144.206.181.53]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9661C43D53 for ; Tue, 12 Jul 2005 14:00:16 +0000 (GMT) (envelope-from rik@cronyx.ru) Received: (from root@localhost) by hanoi.cronyx.ru (8.13.0/vak/3.0) id j6CDvDlf080695 for freebsd-net@freebsd.org.checked; Tue, 12 Jul 2005 17:57:13 +0400 (MSD) (envelope-from rik@cronyx.ru) Received: from [144.206.181.94] (hi.cronyx.ru [144.206.181.94]) by hanoi.cronyx.ru (8.13.0/vak/3.0) with ESMTP id j6CDtM4j080674; Tue, 12 Jul 2005 17:55:23 +0400 (MSD) (envelope-from rik@cronyx.ru) Message-ID: <42D3CBD9.2090901@cronyx.ru> Date: Tue, 12 Jul 2005 17:55:37 +0400 From: Roman Kurakin User-Agent: Mozilla Thunderbird 0.9 (Windows/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Giorgos Keramidas References: <42D3B9A8.6000803@cronyx.ru> <20050712134925.GB1061@beatrix.daedalusnetworks.priv> In-Reply-To: <20050712134925.GB1061@beatrix.daedalusnetworks.priv> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: ping delay, initial request X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Jul 2005 14:00:17 -0000 Giorgos Keramidas wrote: >On 2005-07-12 16:38, Roman Kurakin wrote: > > >>Hi, >> >> I am starting to investigate some net problem and I wonder if this >>problem seen/known. >> The problem was observed with ce(4) (Cronyx Tau32-PCI/Lite, >>it is not in the tree yet, but similar to cp(4)/ctau(4) devices) and >>sppp(4). >>If you run usual ping you will see normal delay which is much less than >>1sec. >>But if you run flood ping, stop it, and run normal ping again you'll see >>delay >>about one sec. >> >>ping x.x.x.x >>delay << 1 sec >>ping -f x.x.x.x >>average delay << 1 sec >>ping x.x.x.x >>delay ~ 1 sec >> >>This was seen on FreeBSD 4.11 stable. >> >>Any ideas? Does any body observed such behaviour in other environment? >> >> > >Is it possible that flood ping hits an icmp rate-limiting watermark and >then every subsequent icmp packet gets penalized with a delay until a >fair amount of time passes? > > Wasn't observed on ethernet iface. But this is good idea to test delay by some other type of packets. Do you know any good ans simple tool for that? rik >_______________________________________________ >freebsd-net@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-net >To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" > >