Date: Thu, 25 Jul 2002 12:03:50 -0700 (PDT) From: David Raistrick <drais@wow.atlasta.net> To: Mark Koskenmaki <bsdlists@nwbombers.com> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: PPPoE Message-ID: <Pine.BSF.4.21.0207251153360.60869-100000@wow.atlasta.net> In-Reply-To: <016701c23404$01d14280$0702a8c0@win98>
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On Thu, 25 Jul 2002, Mark Koskenmaki wrote: > Or, via a VPN. I have just never seen a VPN, but believed they put quite > a bit of extra overhead on the network, reducing throughput. > > Now, am I shooting in the dark here, or what??? Nope, you're not. I missed your earlier posts, but I assume you're using wireless LAN equipment for ISP access. PPPoE will do what you're looking for, and well. It DOES add some overhead, though. Rough numbers would be something in the realm of 8-10%. So if you've got BreezeAccess radios that, with one SU, can do a theoretical 3Mb...you get closer to 1.7Mb avg after the FHSS overhead..drop 10% and that leaves you perhaps 1.5Mb. If you're in a more realworld situation where your customers are seeing only 700kb or so, you're down to 630kbs... Keep it in mind. Also, the stock freebsd pppoe CLIENT is a big pig. On a 600mhz celeron box it'll eat nearly 90% cpu at 100base speeds. OTOH, while I didnt watch the numbers, inhouse testing using a Piii 1ghz freebsd pppoe server didnt bog with 2-5 active full-speed connections. Again, I didnt look closely at the load at that end. If you need any help let me know, I've got some small amount of pppoe w/ freebsd experiance...usually in a test-lab configuration, but i'm sure that'd help you get started. --- david raistrick drais@atlasta.net http://www.expita.com/nomime.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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