From owner-freebsd-net@FreeBSD.ORG Sun Nov 21 00:35:09 2010 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 90369106566C for ; Sun, 21 Nov 2010 00:35:09 +0000 (UTC) (envelope-from pozar@lns.com) Received: from kumr.lns.com (kumr.lns.com [209.237.227.146]) by mx1.freebsd.org (Postfix) with ESMTP id 7AA6F8FC1C for ; Sun, 21 Nov 2010 00:35:09 +0000 (UTC) Received: from Tim-Pozars-MacBook-Pro-4.local (kumr.lns.com [209.237.227.146]) by kumr.lns.com (8.14.3/8.14.3) with ESMTP id oAL09XGT061029 for ; Sat, 20 Nov 2010 16:09:56 -0800 (PST) (envelope-from pozar@lns.com) Message-ID: <4CE8633D.3020501@lns.com> Date: Sat, 20 Nov 2010 16:09:33 -0800 From: Tim Pozar User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: freebsd-net@freebsd.org X-Enigmail-Version: 1.1.1 OpenPGP: id=83385B04; url=http://www.lns.com/house/pozar/pozar_4096_rsa_public.asc Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-102.5 required=5.0 tests=AWL,BAYES_00, USER_IN_WHITELIST autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on kumr.lns.com Subject: FreeBSD is occasionally not replying to ICMP packets... 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: Sun, 21 Nov 2010 00:35:09 -0000 Sending to a FreeBSD 8.0 RELEASE box from a cisco switch that the BSD box is directly connected to... > cs01-200p-sfo#ping netmon repeat 1024 > > Type escape sequence to abort. > Sending 1024, 100-byte ICMP Echos to 207.241.239.174, timeout is 2 seconds: > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > !!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!! > Success rate is 99 percent (1019/1024), round-trip min/avg/max = 1/2/9 ms > cs01-200p-sfo# On the BSD box I see it not replying every 200 pings.... # tcpdump -i bge0 icmp and host 10.1.0.33 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on bge0, link-type EN10MB (Ethernet), capture size 96 bytes 10:55:14.095509 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 0, length 80 10:55:14.095526 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 0, length 80 [...] 10:55:14.658113 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 198, length 80 10:55:14.658119 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 198, length 80 10:55:14.659467 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 199, length 80 10:55:16.663280 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 200, length 80 10:55:16.663291 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 200, length 80 10:55:16.665421 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 201, length 80 [...] 10:55:17.166991 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 398, length 80 10:55:17.167003 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 398, length 80 10:55:17.169476 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 399, length 80 10:55:19.170156 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 400, length 80 10:55:19.170167 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 400, length 80 10:55:19.171675 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 401, length 80 [...] 10:55:19.676469 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 598, length 80 10:55:19.676474 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 598, length 80 10:55:19.679062 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 599, length 80 10:55:21.677805 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 600, length 80 10:55:21.677817 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 600, length 80 10:55:21.683652 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 601, length 80 [...] 10:55:22.170528 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 797, length 80 10:55:22.172653 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 798, length 80 [...] 10:55:24.730624 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 998, length 80 10:55:24.733990 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 999, length 80 10:55:26.736330 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 1000, length 80 10:55:26.736343 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 1000, length 80 10:55:26.739407 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 1001, length 80 10:55:26.739417 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 1001, length 80 [...] 10:55:26.808634 IP 10.1.0.33 > 207.241.239.174: ICMP echo request, id 14, seq 1023, length 80 10:55:26.808643 IP 207.241.239.174 > 10.1.0.33: ICMP echo reply, id 14, seq 1023, length 80 I don't see this behaviour on other non-BSD devices on this network such as a Linux box that is also directly connected to this switch. Thoughts? Thanks... Tim