3 Weeks of 1000ms+ Latency Spikes with AT&T

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NoctisLionward

NoctisLionward

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Jan 18, 2015
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I have AT&T as my isp, and for 3 straight weeks I've been getting constant latency spikes that go up past 1000ms and sometimes over 2000. I've tried calling tech support multiple times only for none of them to understand what latency is. They've sent out two technicians who both said their tests showed that everything was working fine. I've also tried going into at&t's forums to get an answer to no avail (linked for reference, check here for more information https://forums.att.com/t5/AT-T-Internet-Features/Extremely-High-Latency-And-Packet-Loss/td-p/5476852 )

Pinging my gateway shows no problems, however pinging my isp's ip is where the spikes start showing, as well as any other ip that isn't my gateway. I have 3 devices on my network, wired and wireless, and all of them are experiencing the spikes even when the others are disconnected.

I really need to find a solution to this problem because not only is it affecting videos, downloads, and games, it's also interfering with my job. You'd think the company that sells the service would be able to help me out of this problem or at least target why it's happening, but it seems like nobody at tech support knows anything about it apart from what their script says to ask, and only the 2nd technician knew what latency is, but not enough to tell what the problem is.
 
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bill001g

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Aug 9, 2012
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I am unsure you are going to get much different response here. Most the suggestion on that forum were valid and it definitely shows a issue with connection between your house and the ISP.

It is very strange to see such huge latency. The actual media/transmission should not be able to introduce that much latency. Things like wifi re transmit data that has errors but if I remember correctly dsl does not do that.

The times I have seen this is because of bufferbloat. The problem though is you only get bufferbloat when too much data is attempting to use the connection and the ISP rather than dropping it is holding the data in a buffer for later transmission. Their other option is to discard the data and you would see packet loss rather than delays. Which is better depends on what type of application you run. Other than games packet delay is better than packet drop.

Still it should not matter. If you are not maxing out your bandwidth, you need to check both upload and download, you should never get data placed in buffers. There is no reason to buffer it if the data can just be sent instead.

The other variation of this is when the data you use combined with your neighbor exceeds the bandwidth. This is more a issue you used to see on cable systems that were over sold. With DSL you have a non shared dedicated connection to the ISP for the connection to your house. This would mean any type of shared bottleneck would be farther up the path. They should not have issues as fast as modern equipment is.

Not sure maybe run only your pc on the connection and then watch the network tab in the event monitor to be very sure your bandwidth usage is no where near your limits.

Still the data you provided in the other post shows very clearly there is a problem that is past your equipment. I suppose it could be the modem in your router but it is extremely unlikely. It depends how desperate you get if you blind replace the router and hope to get lucky.

 
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NoctisLionward

NoctisLionward

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Jan 18, 2015
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4,510
I started ending processes one by one earlier and noticed something odd. I have a Razer chroma keyboard and have Razer software working with it. Razer Central seemed to have been using a lot of data, more than anything else, so I closed it and now my latency appears to be stable at around 20ms throughout most things. I've had this setup since November last year, never once did I have a problem with Razer.
I'll be contacting Razer on that matter, but now I'm back to dealing with the problem of the connection dropping every minute or so. It only started happening after a technician was here, so I'm wondering if he did something wrong. Honestly makes me wish I'd stayed with Comcast, as bad as their service is, at least they had decent cable internet in this area.
 
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