Date: Sun, 20 Jul 2008 11:21:36 -0700 From: Julian Elischer <julian@elischer.org> To: "Kazi A. Sharif" <kazi.sharif@aonb.com.bd> Cc: freebsd-ipfw@freebsd.org Subject: Re: IPFW+Dummynet Capability Message-ID: <48838230.40608@elischer.org> In-Reply-To: <4882C7E6.8010604@aonb.com.bd> References: <4882C7E6.8010604@aonb.com.bd>
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Kazi A. Sharif wrote: > Hello Guys, > I was planning to install a heavy duty bandwidth manager for my ISP. I > went through some documentation and installed IPFW and Dummynet in > FreeBSD 7.0. Before I spent so much time on this I need to know the > limitations that are already noticed: > 1. If we compare IPFW+Dummynet with Allot or Emerging Technologies > Bandwidth manager, how efficient is the IPFW+Dummynet? probably not as efficient.. > 2. Is it possible to control/throttle 800/900Mbps bandwidth using > recommended hardware? It'll be pushing hard to do that. > 3. Can I shape bandwidth for 3000 to 5000 clients with Dummynet where > concurrent connectivity would be 2000 to 3000? "maybe" > 4. If I can serve 5000 users then what would be the performance > decreasing ratio? no idea > 5. If I can not use Dummynet for my requirement then what are the > recommendations? a dedicated load controlling device. You are going to have to do significant tuning with FreeBSD to be able to do this, and if you do not want to become a guru in ipfw and network processing in the BSD kernel then it is a much better use of your time to research some dedicated hardware. If my boss told me I had to do this, I'd say, "I don't know if it's possible with FreeBSD.. I'll need to do some testing" and if it was close I'd consider doing it because I have confidencein my knowledge of the networking code, that I cold probably hack the kernel enough to give me a specdial purpose kernel that could do it, but if it wasn't close I wouldn't bother. My suspicion is that it won't be "close" at this time, but the only thing you can try is to simulate it. > Thanks in advance. > Sharif > > > _______________________________________________ > freebsd-ipfw@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw > To unsubscribe, send any mail to "freebsd-ipfw-unsubscribe@freebsd.org"
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