Date: Thu, 10 Jan 2002 09:25:26 -0800 (PST) From: Richard Hodges <rh@matriplex.com> To: "Prof. Dr. Ulrich Nepustil" <ulrich@nepustil.net> Cc: freebsd-atm@FreeBSD.ORG Subject: Re: Probs with PCA200 Message-ID: <Pine.BSF.4.10.10201100910150.13379-100000@mail.matriplex.com> In-Reply-To: <20020110170334.EA05879F5E@iscserv7.nepustil.net>
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On Thu, 10 Jan 2002, Prof. Dr. Ulrich Nepustil wrote: > I tried to setup a BSD 4.4 box with a marconi PCA200 card. > > /sbin/fore_dnld -d /etc > /sbin/atm set netif hfa0 atm 1 > /sbin/atm attach hfa0 sigpvc > /sbin/ilmid > /sbin/ifconfig atm0 217.146.128.226 netmask 255.255.255.252 up > /sbin/atm add pvc hfa0 7 35 aal5 snap ip atm0 217.146.128.225 > iscserv16# /sbin/atm add pvc hfa0 7 35 aal5 snap ip atm0 217.146.128.225 > atm: Invalid VPI or VCI value > iscserv16# /sbin/atm add pvc hfa0 0 35 aal5 snap ip atm0 217.146.128.225 > > why cannot i use another VPI than 0 ? The Fore firmware or logic engineers probably made an engineering decision to only support VPI 0. Perhaps they figured that the typical connection would be to a switch, and this would make things simpler. The Fore LE155 and LE25cards can support other VPI values, but you have to trade bits in the VPI for your VCI bits. I believe that your options are: VPI = 0, VCI = 0-4095 VPI = 0-1, VCI = 0-2047 VPI = 0-3, VCI = 0-1023 VPI = 0-255, VCI = 0-15 (this one is not very practical) For virtual circuits with modest receive bitrate, a programmer could allow any arbitrary VPI/VCI, and handle the SAR functions in software. There is no hardware limitation on VPI/VCI for transmitting. I know of two FreeBSD drivers for the ForeLE cards (IDT 77211), so this may be an option if you would like to experiment. All the best, -Richard To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-atm" in the body of the message
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