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Huge Latency with WRT54G

post #1 of 10
Thread Starter 
Hi People !
I'm having trouble with wireless networking. I have a WRT54G Linksys wireless router, coupled with an AM300 ADSL modem, mostly used for internet sharing around the house.
But, since yesterday, I've tried transferring data between computers, and noticed huge latency from one computer to another. It also is often that when i start copying a lot of things, it will at one point stop...
Does anybody have any experience with this router, and know how to improve its performance ?
Thank You.
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post #2 of 10
well i had one HAD being the key word. i had alot of problems with it so i switched to a belkin mimo and i love it.
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post #3 of 10
Thread Starter 
Have you ever found out what causes the slowing down of the network for data transfer rates ? I mean internet works fine... It's just the computer to computer data transfer rates that are slow..
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post #4 of 10
Well, there could be numerous of reasons why.

so lets break it down...

1. Are they all on the same Workgroup/Domain?
2. Are all the units wireless? if so, reset there connection (Windows zero config)
3. Reset the main wireless router.
4. perform windows updates on all the main machines.

Also, try and cap your transfer rate over wireless, im sure theres 3-rd party apps that can cap your network transfer rates.
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post #5 of 10
1) Define latency. Technically latency is a delay in the task asked being performed. This would mean you had long ping times pinging across the network. What you probably mean is slow transfer speeds. If your system is running wireless this is to be expect. Wireless only supports a theoretical max speed of 54Mbps. If you convert this to MB (bits vs bytes) it's 6.75 MBps. Apply this to file transfer, and it will take you 2.5 minutes to trasfer a 1 gig file across your network. Wireless normally won't even reach 54mbps, and as such the transfer times are actually slower than this. Since your internet isn't nearly even this fast (in most cases) you don't notice the difference as much.

2) stops transfering.... This is probably either A) windows, or B) the router. Check to see if the router is overheating when doing TONS of work. It's not uncommon for a hard worked router to have heat issue. If it's hot to the touch, this is probably the problem. If not download and run TCP Optimizer on all of your PCs. This will help reconfigure windows to tranfer files better.
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post #6 of 10
Thread Starter 
What I meant by latency was high ping times... more than a second...
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post #7 of 10
Quote:
Originally Posted by gravity View Post
What I meant by latency was high ping times... more than a second...
ok (i love when people use the right terms ).
Again, check heat. Heat is a real killer and little investigated problem with routers. Check for a lot of network traffic (ie scan for networks in your area and see if you get a lot of hits). If tons of your neighbors are using wifi your router will see any communication within it's range, and it reads it before determing it was address to it, which will incresae latency. Changing the channel on your router should help with this. Also are you using security? If so you have to remember you're having to validate 2x (each PC) where you only validate once to get to the intenet. Also if you're running AV\\Firewall on both PC's these are processing the traffic.
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post #8 of 10
Thread Starter 
No, I am not using security... I am pretty sure that I'm the only one in my neighbourhood to have wireless capabilities, and i seriously doubt that anybody is stealing my internet. And no, nobody uses the router. Traffic is zero.
Temps may be a problem, but i think the problem is localised on my desktop's WMP54g wireless adapter. It seems to have such a weak link with the router, and drops very often...
Anybody have any experience with that ?
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post #9 of 10
Quote:
Originally Posted by gravity View Post
No, I am not using security... I am pretty sure that I'm the only one in my neighbourhood to have wireless capabilities, and i seriously doubt that anybody is stealing my internet. And no, nobody uses the router. Traffic is zero.
Temps may be a problem, but i think the problem is localised on my desktop's WMP54g wireless adapter. It seems to have such a weak link with the router, and drops very often...
Anybody have any experience with that ?
Low signal will cause latency becuase the router still does error checking. If you'e loosing packets you may be sending data 3-5 times to get it all throgh without errors. How far from the router is the desktop, have you checked to make sure the router is set to 90% power (some at at 70% broadcast power by default). Be careful becusae upping the power ups the heat. Check to make sure the NIC is set to G mode. If none of this works you may have interference issues (cordless phones, metal sheilded insultation in your house, etc).
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post #10 of 10
Also, make sure that you have set up the wireless link to auto-negotiate speed. If you try to force it to 54Gbps for example, and your signal is kinda weak, you will get huge latencies... if you let it do automatic speed negotiation, it will be better to transmit/receive at 36 or even 24Gbps rather than 24...
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