Re: HELP- very slow download speeds
On Thu, 21 May 2015 16:58:45 -0700
Gary Roach <gary719_list1@verizon.net> wrote:
> I have 4 systems that have squeeze, wheezy and jessie on them. I
> haven't updated one in a long time. They all suffer from extremely
> slow downloads. I have a 50M verizon fiber optic line to a M1424WR
> router / switch. I also have fios and my phone line on the same
> system. When I start a download, it starts at 50M for the first few
> seconds and then drops to 500K to 100K range. All 4 system react the
> same. Two are the same hardware but one is older hardware and one is
> a dual boot Toshiba laptop.
>
> Verizon insists their lines are OK. The have change out the router,
> the interface unit outside and have bypassed the coax with there own.
> Everything checks out. I have run their speed checker while
> downloading. The speed checker shows 50M (about) and the download
> speed is simultaneously around 250K. Everything is hardwired - no
> wifi hookups. Further, my NetFlix may hickup once in a while but
> generally works ok. No problems with our phone service.
>
> When this started, I was getting lots of packet loss errors with
> "ping -f -U <address>" but that has stopped today. The slow downloads
> still persists
>
> I'm at a loss as to what is wrong. Any ideas will be sincerely
> appreciated. I think Verizon is about to dump me on my head and wash
> their hands of the whole problem. Thus leaving me with a dialup speed
> expensive connection.
>
> Gary R
>
What are your upload speeds like? If they're ridiculously slow compared
to your download speed, then you may find that you're not able to ACK
packets quickly enough to sustain a steady 50M download (I can't
immediately work out at what sort of level this will happen, but I'm
sure there's someone more versed in networking who can tell you).
Another consideration is to look at the router's statistics page for
line errors. You might find that packets are being retransmitted a lot,
which will lower the effective rate of transmission (though, if it's to
the point of constraining 50M down to 250K, then there's something
wrong with the line).
Finally, don't rule out the possibility that your ISP is throttling
you. While you may be synced at 50M and may be able to transfer at that
for short periods (and thus, the ISP can rightly claim that you have a
50M connection), they could conceivably throttle your connection in the
longer term.
>
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