How are you getting MB/s speed with your wireless network? I am impressed! ***Update***

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FrustratedUser

Lifer
Aug 16, 2001
22,505
4
81
So I see all of you complaining about 'only' getting 5MB/s transfer speed on your wireless network.
I would be happy to get that!!!!
Here is the network.


Computer A & B are connected with Cat-5 to router. Transfer speed between those two machines are 65 - 70 Mbit/s, it works just fine :)
Computer C & D are connected with Wireless (WLAN) using a Xterasys XN-2522g IEEE 802.11g network cards.
My problem is that the performance of the wireless network is... well not great. Let me tell you.

File transfer between Comp A and C is crap. I get at most 700kbit/s. Signal strength is 'Good' to 'Best'. (The indicator says the signal is at '-23', whatever that means)
Computer C is half a stair down and the signal has to go through a door and a wall, total distance is ~20 feet.

Transfer between Comp A and D is satisfactory to me. It goes up to 5.5Mbit/s, around what I was expecting to get. Signal strength is 'Normal' (-47 on idicator). Distance is around 10 feet and the signal has to go through a door and a wall and a built in cabinet. Comp D is a desktop stacked up against the wall. IMO this is the worst placement of any of my computers but it still gets very good speeds. :confused:

Transfer between Comp C and D is OK. Speed is up to 3.6Mbit/s. Distance is around 15 - 20 feet and the signal has to go through one wall.


Can you help me out here? Why is the transfer speed between A and C crap when it is OK between A and D, and between C and D? :confused:

All computers are running Win2K SP4.

-------
edit:

Looks like thew problem is incoming traffic to 'C'. What could be wrong?
 
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gutharius

Golden Member
May 26, 2004
1,965
0
0
Are you transferring the same files each time. Smalleer files can slow your transfer speed as it is constantly creating and closing files on the other computer.
 
F

FrustratedUser

Lifer
Aug 16, 2001
22,505
4
81
Always the same 9MB MP3 file.
I have had 5Mbit/s between comp A and C but only for a very short time, It always crapped out and dropped back to 700Kbit.
 
W

Wizkid

Platinum Member
Oct 11, 1999
2,728
0
0
Maybe there is some strange interference between A & C? I would try moving C to a different location, if that solves the problem, then move it back and start hunting for sources of interference: anything wireless, microwaves, solid doors/solid objects, etc.
 
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geekender

Platinum Member
Apr 26, 2001
2,414
0
0
Have you used a program like netstumbler to see what your wireless strength is? 802.11 standards drop in speed as the distance increases. Also, what is the speed of the cmoputer you are running and does it run differently when wired directly into the network? You need to eliminate that the PC itself is the bottleneck. Finally, how are you coming up with the speed? Are you running a throughput testing program like iperf or what method are you using?
 
F

FrustratedUser

Lifer
Aug 16, 2001
22,505
4
81
Originally posted by: geekender
Have you used a program like netstumbler to see what your wireless strength is? 802.11 standards drop in speed as the distance increases. Also, what is the speed of the cmoputer you are running and does it run differently when wired directly into the network? You need to eliminate that the PC itself is the bottleneck. Finally, how are you coming up with the speed? Are you running a throughput testing program like iperf or what method are you using?
Click to expand...

No I haven't tried netstumbler. I just transferred a 9MB MP3 file and measured the time it took to transfer it and also watching the speed indicator on the firewall (Sygate Personal).

Computer A is a AXP Barton 2500 @ 3200 speed.
Computer B is a A65 3500 @ 2.6GHz
Computer C is a Celeron 500
Computer D is a Celeron 300
All of them running Win2K SP4.

So I should use netstumbler and iperf, along with moving the computer.
Thanks for the replies. :thumbsup:
 
F

FrustratedUser

Lifer
Aug 16, 2001
22,505
4
81
Running Q Check was really interesting. Here are the results:

Doing a transfer from 'A' (Endpoint 1) to 'C' (Endpoint 2) showed a throughput of ~700kbit/s :(
BUT
Doing a transfer from 'C' to 'A' showed a throughput of ~10Mbit/s :Q :D :thumbsup:

:confused:

So there is something funky going on here on the main rig (A, from where I'm posting now).
Traffic from 'A' is dead slow but the other direction is great.

So network gurus, what should I check now? Remember 'A' is not using wireless. It's hoocked up with normal cable. I have not yet tried a transfer between 'A' and 'B' (both using normal cable LAN).
 
F

FrustratedUser

Lifer
Aug 16, 2001
22,505
4
81
More tests:

Troughput from 'A' to 'D' ---> 5.5Mbps
Troughput from 'D' to 'A' ---> 5.0Mbps

Troughput from 'D' to 'C' ---> 668kbps <-------- :(
Troughput from 'C' to 'D' ---> 4.3Mbps


Looks like the problem is incoming traffic to machine 'C'. What could be wrong?
Maybe a clean install of Win2K on machine 'C' will help? :confused:
 
F

FrustratedUser

Lifer
Aug 16, 2001
22,505
4
81
LOL!

Got a new rig coming from Outpost.com. $179 + shipping but backordered :(
I WILL BE BACK!!

Hopefully the problem is permanently fixed. :)
 
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