[EdLUG] Diagnosing a slow Internet problem

Fri Jun 24 02:27:48 UTC 2016

Hi Christian

1) what is the connection method in each case (ethernet, wifi...)

2) have you tried the same machine on a known good connection? (Or a known
good laptop on the connection this PC is on?)

3) tried changing the cable? (Though from what you say is unlikely to be
culprit but worth testing)

4) have you tried a windows or mac on the same cable and connection? (Rule
out os/software)

If you find the variables to affect the outcome please detail ...

// Sent from a mobile device. Brevity and typos may transpire
On 24 Jun 2016 02:02, "Edinburgh Linux Users Group" <
edlug at lists.edlug.org.uk> wrote:

> Hi,
>
> Here are my questions:
>
>    1. Why did my speed tests fail in this situation?
>    2. Are the ping speeds normal for this situation?
>    3. What diagnostic tests can I run to isolate the slowness on this
>    system?
>
> I am volunteering for a low income housing shelter in San Francisco, CA.
> I have put in some quality legacy Lubuntu machines in the lobby for the
> residents to use.  These machines all have Intel Core 2 duo chips with 2 GB
> of RAM and are running Lubuntu 14.04.  I use a similar machine at home, and
> have no problems with it.  This email is being written on such a machine at
> one of the other two homeless shelters.  The residents routinely use these
> machines to watch YouTube video and use LibreOffice, etc., all without
> issue.  The machines are proven good.
>
> This is the third shelter to which I have given machines.  They don't have
> a budget for either the equipment or the tech support for these machines.
>
> Two of the three shelters have good speed on the Internet that goes to the
> machines.  (The shelters provide the Internet service).
>
> However, the third shelter, called the Mentone, has slow Internet speeds
> in the lobby.  I am not able to even do anything as basic as run sudo
> apt-get update, as the machine chokes on downloading the updates.
>
> The wiring is put in place by a company I will call the Maintenance Group
> (MG).  I have called both the MG and the ISP.  Both of them claim that they
> have no problems.  The ISP says that they are providing the usual 2 Mbit /
> second that we expect here in the US for a configuration like this.  The MG
> says that they have run a test on the wiring from the server to the lobby,
> and are not seeing any problems.
>
> The ISP is a good company that does not hate GNU-Linux.
>
> The ISP asked me to give them a speed test directly from the switch, which
> is located in the basement.  So I ran speed tests in the basement and in
> the lobby, and was unable to get the speed test to work.  Speed test has
> worked on this machine before.  Here are the two results:
>
> Lobby, where the Lubuntu machine is to be located:
>
> cje at cje-ultralap440:~$ speedtest-cli
>
> Retrieving speedtest.net configuration...
>
> Could not retrieve speedtest.net configuration: timed out
>
> cje at cje-ultralap440:~$ ifconfig
>
> eth0      Link encap:Ethernet  HWaddr 20:1a:06:04:64:42
>          inet addr:172.16.2.121
>
> basement, directly from the switch:
>
> cje at cje-ultralap440:~$ speedtest-cli
>
> Retrieving speedtest.net configuration...
>
> Could not retrieve speedtest.net configuration: timed out
>
> cje at cje-ultralap440:~$
>
> *My first question:  *I am not sure why this speed test failed.  Does
> anyone know?
>
> Since I couldn't run speedtest, I pinged google instead.  Here are the
> results from the lobby:
>
> cje at cje-ultralap440:~$ ping www.google.com
>
> PING www.google.com (216.58.192.4) 56(84) bytes of data.
>
> 64 bytes from nuq04s29-in-f4.1e100.net (216.58.192.4): icmp_seq=1 ttl=52
> time=8.24 ms
>
> 64 bytes from nuq04s29-in-f4.1e100.net (216.58.192.4): icmp_seq=2 ttl=52
> time=7.31 ms
> <snip>
>
> --- www.google.com ping statistics ---
>
> 16 packets transmitted, 12 received, 25% packet loss, time 15037ms
>
> rtt min/avg/max/mdev = 6.962/7.497/8.198/0.366 ms
>
> Here is the test from the basement:
>
> cje at cje-ultralap440:~$ ping www.google.com
>
> PING www.google.com (216.58.192.4) 56(84) bytes of data.
>
> 64 bytes from nuq04s29-in-f4.1e100.net (216.58.192.4): icmp_seq=1 ttl=52
> time=8.24 ms
>
> 64 bytes from nuq04s29-in-f4.1e100.net (216.58.192.4): icmp_seq=2 ttl=52
> time=7.31 ms
> <snip>
>
> --- www.google.com ping statistics ---
>
> 11 packets transmitted, 11 received, 0% packet loss, time 10015ms
>
> rtt min/avg/max/mdev = 7.022/7.816/8.519/0.451 ms
>
> cje at cje-ultralap440:~$
>
> *My second question*: Are these ping speeds normal?
>
> My third question: What can I do to find the problem with the system?
>
> Thanks!
>
>
>
>
> --
> Christian Einfeldt
>
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> EdLUG at lists.edlug.org.uk
> https://lists.edlug.org.uk/mailman/listinfo/edlug
>
>
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