Archived from groups: alt.internet.wireless (
More info?)
Jeff Liebermann wrote:
> On Sun, 24 Oct 2004 22:06:36 GMT, Bob Willard
> <BobwBSGS@TrashThis.comcast.net> wrote:
>
>
>>Jeff Liebermann wrote:
>>
>>
>>>On Sat, 23 Oct 2004 21:16:04 +0100, Dave Brown
>>><dave@nospamhere.dbws.net> wrote:
>>>
>>>
>>>
>>>>Are there any general things to look for to speed up wi-fi performance,
>>>
>>>
>>>Yes. You start by posting numbers.
>>>What performance are you measuring for things like file copies?
>>>What were you expecting?
>>>What's your connection speed? (1, 2, 5.5, 11)
>>>How is the performance from something on the LAN (file server or wired
>>>client)?
>>>Is it symmetrical (same speed in both directions) or does it go faster
>>>in one direction?
>>>Can you retest with the Belkin equiped laptop for a numerical
>>>comparison?
>>>
>>>For 11Mbit/sec, you should be getting about 6Mbits/sec thruput.
>
>
>>Uh, with the latest and greatest (and most expensive) WAPs, maybe so.
>>On my BEFW11S4, I get more like 3-4 Mb/s doing file copies between
>>my wireless laptop and one of my wired PCs.
>
>
> Well, I just ran a quick and potentially inaccurate test in my
> palatial office and got about 6.0 Mbits/sec using 802.11b. Of course,
> I was about 3ft away from the DLink DI-614+ router with a customers
> Sony Vaio PCG-FX220 laptop and an Orinoco Silver card. 11mbit/sec
> association and 64 bit WEP. My test was copying a single 10MB file
> from my SCO OSR5 file server running Samba something. File copies use
> TCP. I also ran a really crude test using netcat -u to dump the 10MB
> directly to an IP socket using UDP. Slightly slower than TCP. It
> should have been faster. I'll figure out why later.
>
> 3-4Mbits/sec on file copies is about what I get when I have a
> 5.5Mbit/sec connection. Maybe that's why you're not getting the
> "normal" 6Mbits/sec. I just went outside and the connection slowed
> down to 5.5Mbits/sec. I got 2.8Mbits/sec with file copy. It should
> have been a bit higher but I'm probably getting interference from the
> neighbors.
>
>
>
>
Nope - my laptop sits <10 ft. from my BEFW11S4 and always runs at 11 Mb/s,
and 3-4 Mb/s is what I get copying large files from the laptop to a
(100 Mb/s) wired desktop. WEP made a little difference, but <10% IIRC.
My tests were all run using a network mapped drive, pushing large files
from the W2K laptop to a W9x desktop via Explorer's cut'n'paste. I haven't
redone any testing to XP desktops -- that might be faster.
I use big single files for network datarate testing - 300-600 MB, and I
measure transfer time with a watch since some network software reports
datarates rather inaccurately. And, FWIW, my WiFi segment only has one
node plus the WAP, so I'm not sharing the 11 Mb/s (other than the
unavoidable HDX nature of WiFi). Also, my MTUs all match (1500 bytes)
and the RWINs are all pretty big.
--
Cheers, Bob
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