From owner-freebsd-net@FreeBSD.ORG Thu Oct 18 04:19:23 2007 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 6119D16A418 for ; Thu, 18 Oct 2007 04:19:23 +0000 (UTC) (envelope-from sandiegobiker@gmail.com) Received: from wx-out-0506.google.com (wx-out-0506.google.com [66.249.82.233]) by mx1.freebsd.org (Postfix) with ESMTP id 19F1413C447 for ; Thu, 18 Oct 2007 04:19:22 +0000 (UTC) (envelope-from sandiegobiker@gmail.com) Received: by wx-out-0506.google.com with SMTP id h29so35050wxd for ; Wed, 17 Oct 2007 21:19:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type; bh=6pfy2kjVKDcDPFruszB/qolNRyC83aO+F/uhUhmIJtw=; b=BXzAx2ztSKZKbnIBT1K0dQ4VmWF9qkYViOYagT+pxngVCCQW0twCFMzidp6Y0CGUeA8lNSevHOxmNwnFoCntb+xKoIAZeBg8N1oecpEIxedeCOS6jAs34qki3zaWCNt8OLZ4BUz8/RO83RLdhTgdGVAcnVreiCqk0gYzNj/s5tM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type; b=WDLpp0lYmhBWG9lItwc9XBFru52SkjvbU+q3I33SWDcpGIzK1hIiCO5XTk/enSs5NwnZjKE6T4oNCxg6BoFldwq7c/VY2VkgEveGGEykGiwByiEH0oJnnnHJaW0Y57lKvZ1Ex3x1qydao4jw7YeFToqzb320OLuRf14e8j6a2SM= Received: by 10.70.14.17 with SMTP id 17mr129517wxn.1192679494788; Wed, 17 Oct 2007 20:51:34 -0700 (PDT) Received: by 10.70.19.9 with HTTP; Wed, 17 Oct 2007 20:51:34 -0700 (PDT) Message-ID: <27cb3ada0710172051t536a4d11pfdfdb079ebd98932@mail.gmail.com> Date: Wed, 17 Oct 2007 20:51:34 -0700 From: "Len Gross" To: freebsd-net@freebsd.org. MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Disable Exponential Backoff (retry) on Ethernet? 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: Thu, 18 Oct 2007 04:19:23 -0000 I'm doing some protocol development and it is convenient to start it on Ethernet. I will need to send a packet to the Ethernet device and only have it be sent once, even if there is a colision. (Higher levels in the protocol will detect the failure.) I've searched quite a bit, and haven't found any place that talks about this. Are there any hardware cards, or drivers, that let me turn off the backoff/retry behavior? -- Len