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Huge latency/ping spikes at random times with no apparent cause.

Last response: in Networking
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June 20, 2012 6:37:00 AM

Since about 3 weeks ago my DSL has been getting totally random ping spikes, from under 40 to over 1500MS for minutes to hours on end. Nobody else is using my internet, I've verified this. There is nothing sucking up bandwidth on any connected device or computer, as far as I can tell through troubleshooting to the best of my ability. I tried switching to a Cisco X2000 modem/router combo and it did nothing, still totally random latency. Also, when I called AT&T about this, they didn't even know what ping was. They ran an upload/download speed test (which is still mostly consistent regardless of latency) and told me I was basically making the issue up.

I have Wireshark installed but I'm not sure how to effectively search for what might be causing this issue.

Example of experienced latency


Literally 3 minutes later, then it came back 10 minutes after this.
June 20, 2012 6:46:35 AM

I tried this, switched to Googles opendns on my router... didn't do a thing.
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June 20, 2012 6:50:15 AM

I would leave the router and try it on the PC affected. you can also try going to command prompt and typing tracert google.com or whichever domain is giving you issues. should show where the problem starts
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June 20, 2012 7:11:23 AM

jamesmcuk said:
I would leave the router and try it on the PC affected. you can also try going to command prompt and typing tracert google.com or whichever domain is giving you issues. should show where the problem starts


Currently I don't have any high ping, but I have done a tracert before and it had high ping for every single hop/connection from 2-9
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June 20, 2012 7:20:50 AM

jamesmcuk said:
I would leave the router and try it on the PC affected. you can also try going to command prompt and typing tracert google.com or whichever domain is giving you issues. should show where the problem starts


Also, every PC/Device on the network is affected when this happens.
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