[Ubuntu-US-CA] Internet slowdown

Fri Jun 24 19:47:34 UTC 2016

Hi Aleksander,

Thanks, that was really helpful!

Anyone else have any thoughts?  For example, I am able to run speedtest at
home, but not at the homeless shelter, using the same machine and the same
cable.  Just very strange.

On Fri, Jun 24, 2016 at 12:34 PM, Aleksander Vadnjal <vadnjal at gmail.com>
wrote:

> For Google I got 0 packet loss and my time is approx 15ms.
> Check that your Ethernet cables are 100%, see if sockets are OK too. You
> should not loose no packets. That is just too bogus. Let me know. Also try
> wifi and see there might be a switch that is malfunctioning.
> On Jun 24, 2016 12:20 PM, "Christian Einfeldt" <einfeldt at gmail.com> 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?
>>
>> As most people on this list know, Partimus is volunteering for a low
>> income housing shelter in here in SF.  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 we 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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-- 
Christian Einfeldt
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