This is a classic example of QoS usage.
The VPN connection doesn't experience the problem because the QoS
settings for VPN would have a no throttling policy attached. SSH would
typically be non-throttled as well.
On 02/17/2013 08:02 PM, Derek Trotter wrote:
> For several weeks I've had a problem with my earthlink dsl service.
> Anytime I'm doing something that uses all or most of my downstream
> bandwidth, all data coming into or going out of my apartment stops.
> At the same time I'm downloading something a series of updates for
> kubuntu and listening to streaming audio, both stop. If I'm using my
> windows box to download something else, that too stops. After a pause
> lasting anywhere from a second or two to 15 or 20 seconds, the
> downloads resume. A few seconds later, there's another pause. This
> cycle repeats itself until the download is complete or I give up.
>
> Each computer has two nics. The problem persists no matter which one
> either machine is using for it's internet connection. If I remove the
> router, connect the dsl modem directly to either computer, the problem
> persists. I even went to the closet and got the modem when I had dsl
> from AT&T. I set it to work with the earthlink service and the
> problem persists.
>
> Saturday an AT&T technician was here, checked the line from the cord
> that plugs into the dsl modem and says the line is in excellent shape
> and noise levels are very low. This is not surprising since I live
> less than 1/4 mile from AT&T's local office where all their equipment is.
>
> Since I've tried two computers, 4 nics, two dsl modems and removed the
> router, and the problem still persists, I'm guessing the problem is
> somewhere at earthlink's end.
>
> Tonight at 21:30 EST, an earthlink tech support person from somewhere
> in India called to tell me they had fixed the problem. While he was
> on the phone I tried downloading something else and guess what. The
> problem was not fixed. As near as I can tell, the dsl connection does
> not go down. The earthlink people say it stays up. The lights on the
> modem that are on when the connection is up never go off or blink.
>
> The man asks me what dns settings I use. I tell him 8.8.8.8 and
> 8.8.4.4. He says I should try earthlink's dns servers. To humor him
> I changed the settings on the windows box and guess what. The problem
> did not go away.
>
> Maybe I'm missing something, but it's my understanding that once the
> download has begun, that dns has already done it's job and has no
> further role to play. One more thing. If I use a VPN connection, I
> have no problem with it.
>
> Any idea what's going on? If you were to venture a guess, would you
> say the problem is at my place, with AT&T or with Earthlink?
>
> Thanks
>
> Derek
> --
> "I get my copy of the daily paper, look at the obituaries page, and if I'm not there, I carry on as usual."
>
> Patrick Moore
>
>
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