From owner-freebsd-hackers Mon Nov 1 16:16:22 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from florence.pavilion.net (florence.pavilion.net [194.242.128.25]) by hub.freebsd.org (Postfix) with ESMTP id 4ABB214DB4 for ; Mon, 1 Nov 1999 16:16:03 -0800 (PST) (envelope-from joe@florence.pavilion.net) Received: (from joe@localhost) by florence.pavilion.net (8.9.3/8.8.8) id AAA37358 for hackers@freebsd.org; Tue, 2 Nov 1999 00:16:02 GMT (envelope-from joe) Date: Tue, 2 Nov 1999 00:16:02 +0000 From: Josef Karthauser To: hackers@freebsd.org Subject: Ping - sized tests with 0% and 100% packet loss! Any ideas? Message-ID: <19991102001602.B25673@florence.pavilion.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre2i X-Mailer: Mutt 1.0pre2i X-NCC-RegID: uk.pavilion Organisation: Pavilion Internet plc, 24 The Old Steine, Brighton, BN1 1EL, England Phone: +44-845-333-5000 Fax: +44-845-333-5001 Mobile: +44-403-596893 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hey guys, A wierd one. I'm trying to track down a packets size (I believe) problem on my network. During ping testing I've come across the following strange which I don't understand. Using various sized packets ($n) with: ping -f -c 300 -s $n localhost I'm getting results that I wouldn't expect: Size PacketLoss 1 14% 2-10 0% 11 100% 12 0% 13 100% 14 0% 15 100% etc. Anyone any idea what's going on? I've tcpdump/tcpshow'd the traffic and the packets are definitely going out, but no replies are coming back. For the size of 1 we only get 256 packets back and no more. I've scanned though the ping code, and everything's fine up to and including the return from 'sendto'. Does anyone know this part of the kernel? Joe -- Josef Karthauser FreeBSD: How many times have you booted today? Technical Manager Viagra for your server (http://www.uk.freebsd.org) Pavilion Internet plc. [joe@pavilion.net, joe@uk.freebsd.org, joe@tao.org.uk] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message