From owner-freebsd-net@FreeBSD.ORG Wed Jan 17 22:05:10 2007 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id ABFE516A416 for ; Wed, 17 Jan 2007 22:05:10 +0000 (UTC) (envelope-from freebsd-net@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 3184213C465 for ; Wed, 17 Jan 2007 22:05:09 +0000 (UTC) (envelope-from freebsd-net@m.gmane.org) Received: from root by ciao.gmane.org with local (Exim 4.43) id 1H7Ity-0002Rf-Ju for freebsd-net@freebsd.org; Wed, 17 Jan 2007 23:05:02 +0100 Received: from mkb-198-158-209-82.3.cust.bredband2.com ([82.209.158.198]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 17 Jan 2007 23:05:02 +0100 Received: from mc by mkb-198-158-209-82.3.cust.bredband2.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 17 Jan 2007 23:05:02 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-net@freebsd.org From: Michael Widerkrantz Date: Wed, 17 Jan 2007 22:54:45 +0100 Organization: Temple of the Moby Hack, http://hack.org/mc/ Lines: 59 Message-ID: <86lkk1jp3u.fsf@tim.hack.org> References: <45ACF404.20700@ide.resurscentrum.se> <2a41acea0701160958m27c3537ctb25e5420e7a46891@mail.gmail.com> <45AD3C4E.1050608@ide.resurscentrum.se> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: mkb-198-158-209-82.3.cust.bredband2.com User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.3 (berkeley-unix) Cancel-Lock: sha1:0epBIdkklAI2gmViY1gHrykJlKI= Sender: news Subject: Re: Lenovo X60 em 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: Wed, 17 Jan 2007 22:05:10 -0000 Jon Otterholm writes: > I think I found a pattern to work with. If I do a echo-reply wit the > "-D" (no fragment) and increase the packet size (-s) to 1472 I get > normal response times: I can verify that. I tried pinging the laptop from another machine (10.0.0.2) in my small home LAN. With large packets: tim# ping -D -s 1470 10.0.0.20 PING brain.internal.hack.org (10.0.0.20): 1470 data bytes 1478 bytes from 10.0.0.20: icmp_seq=0 ttl=64 time=1.278 ms 1478 bytes from 10.0.0.20: icmp_seq=1 ttl=64 time=1.321 ms 1478 bytes from 10.0.0.20: icmp_seq=2 ttl=64 time=1.235 ms 1478 bytes from 10.0.0.20: icmp_seq=3 ttl=64 time=1.178 ms 1478 bytes from 10.0.0.20: icmp_seq=4 ttl=64 time=1.096 ms 1478 bytes from 10.0.0.20: icmp_seq=5 ttl=64 time=1.499 ms 1478 bytes from 10.0.0.20: icmp_seq=6 ttl=64 time=1.451 ms 1478 bytes from 10.0.0.20: icmp_seq=7 ttl=64 time=1.363 ms 1478 bytes from 10.0.0.20: icmp_seq=8 ttl=64 time=1.280 ms ^C --- brain.internal.hack.org ping statistics --- 9 packets transmitted, 9 packets received, 0% packet loss round-trip min/avg/max/stddev = 1.096/1.300/1.499/0.119 ms With smaller packets: tim# ping -D -s 64 brain.internal PING brain.internal.hack.org (10.0.0.20): 64 data bytes 72 bytes from 10.0.0.20: icmp_seq=0 ttl=64 time=0.450 ms 72 bytes from 10.0.0.20: icmp_seq=1 ttl=64 time=53.031 ms 72 bytes from 10.0.0.20: icmp_seq=2 ttl=64 time=48.112 ms 72 bytes from 10.0.0.20: icmp_seq=3 ttl=64 time=43.394 ms 72 bytes from 10.0.0.20: icmp_seq=4 ttl=64 time=38.311 ms 72 bytes from 10.0.0.20: icmp_seq=5 ttl=64 time=33.252 ms 72 bytes from 10.0.0.20: icmp_seq=6 ttl=64 time=28.313 ms 72 bytes from 10.0.0.20: icmp_seq=7 ttl=64 time=23.204 ms 72 bytes from 10.0.0.20: icmp_seq=8 ttl=64 time=18.531 ms ^C --- brain.internal.hack.org ping statistics --- 9 packets transmitted, 9 packets received, 0% packet loss round-trip min/avg/max/stddev = 0.450/31.844/53.031/15.422 ms Note what happens after the first packet. The other way, /from/ the laptop, seems fine, though: brain# ping -D -s 64 tim.internal PING tim.internal.hack.org (10.0.0.2): 64 data bytes 72 bytes from 10.0.0.2: icmp_seq=0 ttl=64 time=0.762 ms 72 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.565 ms 72 bytes from 10.0.0.2: icmp_seq=2 ttl=64 time=0.449 ms 72 bytes from 10.0.0.2: icmp_seq=3 ttl=64 time=0.359 ms ^C --- tim.internal.hack.org ping statistics --- 4 packets transmitted, 4 packets received, 0% packet loss round-trip min/avg/max/stddev = 0.359/0.534/0.762/0.151 ms