Date: Fri, 11 Jul 1997 19:45:42 -0600 From: Blaine Minazzi <bminazzi@denverweb.net> To: isp@freebsd.org Subject: Re: T1/T3 Upgrade Options? Message-ID: <33C6E1C6.4817DF24@denverweb.net> References: <199707111537.LAA22297@server.id.net>
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> > Invalid? I doubt it... In "real-life", how often do *MOST* T3 connections > "sustain" 45Mbit/sec throughput in each direction? In "real-life", how > often do ethernet cards "sustain" 100Mbit/sec throughput in each direction? > I think my figures are right on the money, however.. Let's assume for a > minute that you can only achieve 50% throughput on the PCI bus for whatever > reason.. Assuming that the ethernet and the T3 card were running full tilt > (Very, very unlikely in most situations) then with 1 ethernet and 1 T3 port > you still have ((132Mbytes/2)-37Mbytes) = 29 Mbytes left over just for > lolly-gagging around... > > > Ah, if life was only as easy as your trivial account of the world! Even simpler. In "real-life" if you really _NEED_ a T-3, you obviously have the customer base to support it. That also implies that you business is big enough to buy the kind of equipment that can properly handle it, and your most likely _not_ going to try and save a few bucks when that much is riding on uptime. If you can afford a frigging T-3, you sure as hell can afford a cisco to handle the traffic. If you can't afford the cisco, then you are so undercapitalized chances are slim you will survive a few more months. You could also dig the panama canal with a shovel, but why would you really want to? The "sustained thoughput" argument is weak. If you pay for that kind of bandwidth, then try and save a few dollars by putting hardware on the end that cannot handle the capacity of the line, your a damn fool, IMO. There is a lot of "expensive frugality" on this thread. I see it in customers all the time. Many are so concerned with the hardware or upfront cost of a project, they never look at the big picture. Oh well, just my 60K worth. Blaine
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