Good info. Also good to know about the web interface. That's really been my only negative on the Ligo gear.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matt Hardy Sent: Tuesday, June 10, 2008 8:54 PM To: WISPA General List Subject: Re: [WISPA] mesh throughput? Here are some tests we have run with Full/Half/Quarter channel sizes with Atheros super features (WMM/Fast Frames/ Packet Bursting) on and off: Full: Super Off: 24Mbps Super On: 33Mbps Super On / Turbo: 53Mbps Half: Super Off: 11Mbps Super On: 15Mbps Quarter: Super Off: 6Mbps Super On: 7Mbps * Note that these are with LigoWave 802.11 standard products, and not with LigoPTP :) One note is that compression is not on in these tests, and we have found it will improve throughput a bit. However, you have to be careful because you can get somewhat inflated results when using compression because some throughput test utilities use pretty compressible data. The throughput test tool built into LigoWave (nepim - network pipemeter) can be set to use random data patterns by using the -P random switch in shell. I agree with you Tom; we usually recommend a hard set modulation rate for stable links. You're also correct that half size channels max datarate is 27 (54/2). One more thing to add regarding Tom's post... we are designing a new architecture for the web interface so that it will be much, much faster. More to come later! :) -Matt On Tue, 2008-06-10 at 20:21 -0500, Tom DeReggi wrote: > I guess the answer is in what the definition is of "Real World" :-) > > For the record my conservative comment was not meant to be against > Ligowave, but specific to Atheros Mini PCi Cards in general, > regardless of the software platform. > I agree if you can get a peak modulation consistently w/ compression, > sure you can get the speed. The Ligo MB hardware has the processing > power to do the speed, with multiple cards. > However, in my real world, we are lucky to get 18 mbps modulations, > allthough when doing 20Mhz channels we always try for 36mbps mod if we can. > I'm not possitive, but I think the 10Mhz channel may max out at 27mbps > modulation as an option, with Atheros. (Although That should be > verified with Ligo, as I may be mistaken). The problem with commercial > grade services is that they generally don't respond well to frequent > modulation changes. If a modulation is bouncing back and forth from 36 > to 18 to 24 to 36, etc, it will have very undesirable effects on the End > Users' TCP session throughput. > We have found it much more advantageous to hard set the Max modulation > to a lower number that would result in the least frequent amount of > automatic modulation changes. It doesn't matter how fast the radio can > test in peak situations, it matters how fast the end user can push > their data consistently. Usually the best we can count on consistently > is usually closer to 15mbps, in our environment. We bit ourselves in > the Back-side to often quoting 10mbps Full Duplex, and only getting 5 > mb on way and 10 mbps the other, and having our customers Claim we > didn't deliver our SLA, and having to requote/redefine the job. I'm > not saying that people can't get 20mbps, some people here, have just > clearly stated that it was possible for them. I just suggest planning > for the worst, and being conservative in expectation. > > With that said my comment is not a complaint. I can get qty 4- 15 > mbps links out of that one 533 Ligo Box, with 10mhz channels, which is > pretty darn amazing. > > What I liked about Ligo though is their support. They try hard to please. > There software is also very easy to navigate and intuitive. > Its a bit slow to navigate (compared to StarOS or MikroTik), due to > web interface redraw time between screens, but that's not really a big deal. > My units have shown to pretty much be install and leave it units, with > very little trouble. > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "Jason Hensley" <[EMAIL PROTECTED]> > To: "'WISPA General List'" <wireless@wispa.org> > Sent: Tuesday, June 10, 2008 9:42 AM > Subject: Re: [WISPA] mesh throughput? > > > > For the record as well, this is with Fast Frames, Packet Bursting, > > and Compression all turned on. We bounce anywhere from 18-20 meg. > > Very excited about it and EXTREMELY pleased with the results we've > > had from the Ligowave gear. > > > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > On Behalf Of Jason Hensley > > Sent: Tuesday, June 10, 2008 7:52 AM > > To: 'WISPA General List' > > Subject: Re: [WISPA] mesh throughput? > > > > Nope, actually getting 20meg off a 10mhz channel in real world high > > noise environment. > > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > On Behalf Of Tom DeReggi > > Sent: Tuesday, June 10, 2008 1:44 AM > > To: WISPA General List > > Subject: Re: [WISPA] mesh throughput? > > > > We have never been able to get 20mbps realworld out of a 10mhz > > channel w/Ligo, or any OEM style unit. I'd say you are being a bit > > on the optimistic side, or talking best case lab testing. > > > > What I will say is, Ligo was my winner for best "Hardware" package. > > They make it solid, from case, to MB, to Pigtail. > > > > Tom DeReggi > > RapidDSL & Wireless, Inc > > IntAirNet- Fixed Wireless Broadband > > > > > > ----- Original Message ----- > > From: "Jason Hensley" <[EMAIL PROTECTED]> > > To: "'WISPA General List'" <wireless@wispa.org> > > Sent: Monday, June 09, 2008 1:16 PM > > Subject: Re: [WISPA] mesh throughput? > > > > > >> Wes, > >> > >> Are these lab results or "real-world"? Matt (Hardy) has mentioned > >> some similar speeds on some of your other gear as well. For the > >> record I'm able to pull 20meg on a 10mhz channel with Ligowave gear > >> (real-world, 802.11a in a very noisy environment) so I can vouch > >> that it's good stuff - especially for the price. > >> > >> > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] > >> [mailto:[EMAIL PROTECTED] On Behalf Of Wes James > >> Sent: Monday, June 09, 2008 12:30 PM > >> To: [EMAIL PROTECTED]; WISPA General List; Tom Sharples > >> Subject: Re: [WISPA] mesh throughput? > >> > >> For reference, here is a comparison between single and dual radio > >> MESH throughput. > >> > >> > >> Wes James > >> Ligowave > >> 800.742.9865 > >> > >> -----Original Message----- > >> From: [EMAIL PROTECTED] > >> [mailto:[EMAIL PROTECTED] On Behalf Of Rogelio > >> Sent: Monday, June 09, 2008 1:20 AM > >> To: Tom Sharples; WISPA General List > >> Subject: Re: [WISPA] mesh throughput? > >> > >> Tom Sharples wrote: > >>> You must be looking at some older technologies. In clean > >>> environments, > >> we're > >>> seeing 20+ mb/s net data throughput on our dual radio nodes (5 Ghz). > >> > >> Ah, very cool. Please share with me these vendors! > >> > >> So, assuming that you set up the channels to not step on each > >> other, this type of throughput is fairly solid for a dual radio units? > >> > >> > >> > >> ------------------------------------------------------------------- > >> ----- > >> -------- > >> WISPA Wants You! Join today! > >> http://signup.wispa.org/ > >> ------------------------------------------------------------------- > >> ----- > >> -------- > >> > >> WISPA Wireless List: wireless@wispa.org > >> > >> Subscribe/Unsubscribe: > >> http://lists.wispa.org/mailman/listinfo/wireless > >> > >> Archives: http://lists.wispa.org/pipermail/wireless/ > >> > >> > >> > >> > > -------------------------------------------------------------------- > > -------- > > ---- > >> WISPA Wants You! Join today! > >> http://signup.wispa.org/ > >> > > -------------------------------------------------------------------- > > -------- > > ---- > >> > >> WISPA Wireless List: wireless@wispa.org > >> > >> Subscribe/Unsubscribe: > >> http://lists.wispa.org/mailman/listinfo/wireless > >> > >> Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > > > > -------------------------------------------------------------------- > > -------- > > ---- > > WISPA Wants You! Join today! > > http://signup.wispa.org/ > > -------------------------------------------------------------------- > > -------- > > ---- > > > > WISPA Wireless List: wireless@wispa.org > > > > Subscribe/Unsubscribe: > > http://lists.wispa.org/mailman/listinfo/wireless > > > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > > > > -------------------------------------------------------------------- > > -------- > > ---- > > WISPA Wants You! 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