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Windows 7: Latency problems on home network, Engenius 9850 wireless router


19 Jun 2012   #1

windows 7 home premium 64bit
 
 
Latency problems on home network, Engenius 9850 wireless router

Hi, please advise on this if you can, I've been very frustrated by it.

I've set up my home network as follows: Motorola SBV5121 cable modem connected to Engenius 9850 wireless router. I have one pc hooked up to the wireless router by ethernet, and usually there are about 2-3 laptops connecting wirelessly. I have two Macbooks and up to two Windows laptops connecting wirelessly.

Mainly I use the PC (the rest of my family uses the laptops) and I have occasional terrible latency issues, even over the ethernet connection. Ping to google.com through command prompt is >400ms average, on pingtest.net I get >300ms even when there's only one other Windows laptop on the network. Gaming and VOIP are impossible.

I've tried bypassing the router and connecting directly to the modem via ethernet cable, at the advice of my ISP, and I don't have any latency issues when I do that. When I ping my router (192.168.0.1) through PC ethernet connection, the response time is also <1ms. I'm using the latest firmware (kernel and application) on my router, version 2.1.3. I'm using all the default settings, except that my primary DNS server is provided by ISP and my secondary is Google Public DNS (8.8.4.4).

I have a suspicion that the latency issue only arises when one particular Windows laptop is connected to the internet, as quite often the times of high latency coincide with when that laptop is on. Also, this particular laptop manages to ping to google.com <50ms response time through command prompt. But sometimes, the latency problem will just fix itself, but it usually comes back within a week, and I'm getting really annoyed.

Also, possibly related or unrelated, I have occasional problems with even connecting to the internet at all with any device, through the wireless router. Windows troubleshooter either states it is unable to identify and resolve the problem, or that there is a DNS problem (although I've flushed the DNS and I'm using both a ISP provided DNS server and a public DNS). Direct connection to the modem usually resolves the issue. Power-cycling the modem and router only works sometimes. I'm attaching reports from the last two times I was trying to troubleshoot with the windows troubleshooter

So, any advise for my networking woes? Is it more likely the router is messed up, or is it at all possible for a single device on the network to be affecting latency for every other device but itself?



Attached Files
File Type: zip troubleshooting log 1.zip (2.3 KB, 3 views)
File Type: zip troubleshooting log 2.zip (2.4 KB, 3 views)
My System SpecsSystem Spec
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 Latency problems on home network, Engenius 9850 wireless router




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