From owner-freebsd-hackers Mon Feb 16 17:54:21 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA03833 for freebsd-hackers-outgoing; Mon, 16 Feb 1998 17:54:21 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from implode.root.com (implode.root.com [198.145.90.17]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA03792 for ; Mon, 16 Feb 1998 17:54:04 -0800 (PST) (envelope-from root@implode.root.com) Received: from implode.root.com (localhost [127.0.0.1]) by implode.root.com (8.8.5/8.8.5) with ESMTP id RAA29974; Mon, 16 Feb 1998 17:53:14 -0800 (PST) Message-Id: <199802170153.RAA29974@implode.root.com> To: Brandon Gillespie cc: FreeBSD-Hackers@FreeBSD.ORG Subject: Re: Networking Oddity, 16k/sec over 10B2, long pauses. In-reply-to: Your message of "Mon, 16 Feb 1998 16:51:09 MST." From: David Greenman Reply-To: dg@root.com Date: Mon, 16 Feb 1998 17:53:14 -0800 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >We have a 10B2 network. It was getting a little large, so we installed an >Asante 10B2 hub. Before the hub installed I could get great transfer >rates. Now, I get 16k/sec transfer rates (via ftp). When I turn on >hashing in ftp I see it download a chunk, then wait, then download a >chunk, then wait. The waits are usually a second long. I am also seeing >a collision light on the hub. I'm wondering if this pause is FreeBSD >collecting its marbles after a collision; and what could possibly be >causing the collision in the first place. *Nothing* was changed on the >network (or nodes on the network) other than installing the hub and >splitting into segments. Also, this problem only appears with FreeBSD >boxes--ftping from a powermac over the hub to a Digial Unix box gets >decent transfer rates. Sounds like a cabling problem of some kind. The operating system doesn't control the collision behavior - that is done in hardware on the card. The delays you're seeing are packet drops. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message