From owner-freebsd-atm@FreeBSD.ORG Mon Sep 6 16:13:14 2004 Return-Path: Delivered-To: freebsd-atm@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0599E16A4CE; Mon, 6 Sep 2004 16:13:14 +0000 (GMT) Received: from mail.cheapline.net (mail.cheapline.net [65.160.120.246]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0DBBD43D4C; Mon, 6 Sep 2004 16:13:13 +0000 (GMT) (envelope-from rh@matriplex.com) Received: from ts7-mail.matriplex.com (ts7-mail.matriplex.com [192.168.99.2]) by mail.cheapline.net (8.12.8p1/8.11.6) with ESMTP id i86GDAOR034469; Mon, 6 Sep 2004 09:13:11 -0700 (PDT) (envelope-from rh@matriplex.com) Date: Mon, 6 Sep 2004 09:13:10 -0700 (PDT) From: Richard Hodges X-X-Sender: rh@mail.cheapline.net To: Harti Brandt In-Reply-To: <20040906090324.A16723@beagle.kn.op.dlr.de> Message-ID: <20040906085243.A31206@mail.cheapline.net> References: <20040906090324.A16723@beagle.kn.op.dlr.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-atm@freebsd.org Subject: RE: Question on ATM w/ FreeBSD X-BeenThere: freebsd-atm@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: ATM for FreeBSD! List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Sep 2004 16:13:14 -0000 On Mon, 6 Sep 2004, Harti Brandt wrote: > On Sat, 4 Sep 2004, Ted Mittelstaedt wrote: > > TM>> If your card does not support VPI 1, you need a small ATM switch to move > TM>> ATM PVCs from one VPI to another. Fore ASX-200BX is excellent small and > TM>> cheap switch. > TM>> > TM> > TM>Are any of the cards mentioned - Fore LE155, PCA-200, HE155, not support > TM>VCI 1? > ^^^ VPI probably? > > The HE155 has a configurable VPI/VCI space of 12 bits that you can split > between VPI and VCI. Per default the driver uses 2 VPI bits and 10 VCI bits. > > The PCA-200 definitely can do only VPI 0. > > For the LE155 I don't remember. The LE155 can split the bits 0+12, 1+11, or 2+10, but the driver defaults to 0+12 (VPI=0, VCI=0-4095). Since there will be an ATM switch anyway for the DS3-OC3, this should not be an issue. Incidentally, the LE155 does not have a limit on the VPI/VCI combinations for the transmit side, just the SAR on the receive. So if RX traffic is light and/or you don't mind spending CPU cycles doing SAR in software, you could make a driver that had no VPI/VCI limits. At one time, I was thinking about doing this for an ATM/DSL access router. > TM>The Lucent PSAX gear I've seen on the secondary market, some of it is > TM>going for under $100. Compared to a used Fore ASX200BX at $800+, to me that > TM>is worth screwing with it - that is, if anyone can possibly confirm that > TM>the PSAX even is an ATM switch. I would definitely recommend the Fore switch over the SA100 (PSAX100). The modules and spares will be a lot easier to find for the Fore. Unless you really want the dual power supplies of the ASX-200BX, you can get the same switch cheaper by putting the SCP-ASXHA CPU board in the ASX-200WG. In a setting with no SVCs, I don't see any need to upgrade the CPU though. For that matter, the older and larger ASX-200 switches would be just fine, and you can probably buy them all day long for under $100 on ebay. Just be sure to get a spare, as the hard drive won't last forever. (It's a 2.5" SCSI, and a bit hard to find. Old Mac powerbooks are one source.) All the best, -Richard