<div dir="ltr">Thanks to everyone who replied to this thread. I am going to be going back to the homeless shelter soon, and I will update everyone after following the suggestions given in this thread. Thanks! </div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 24, 2016 at 8:31 PM, Mark Weisler <span dir="ltr"><<a href="mailto:mark@weisler-saratoga-ca.us" target="_blank">mark@weisler-saratoga-ca.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Hi Christian,<div>I'm intentionally top posting...</div><div><br></div><div>As a general practice, you want to engage in "bracketing" to try to isolate your networking problem.</div><div>You know that you have a problem all the way out at the end computer in the lobby.</div><div><br></div><div>Now you want to take a notebook computer to the "first place" you have an internet connection at the site. This is probably at the broadband modem or as close to the demarcation point as possible. Assuming you have an ethernet cable connecting from the broadband router to your switch, take a "known good" ethernet jumper cable and plug one end into the broadband modem (or dsl modem) and the other into your notebook. Test the internet connection from there. If bad or flaky or slow you then know to call the ISP. (Probably after rebooting all the electronics and testing again.)</div><div><br></div><div>If good, then disconnect your notebook and connect the broadband modem to the switch. Pick a suitable port on the "LAN side" of the switch and test again. If good you probably know the switch is good. Perform another test on the port serving the lobby of the establishment to learn if maybe that particular port is bad but others are good. It sometimes happens that a port on the "LAN side" of the switch is bad, maybe just one out of N ports, and you can just plug the lobby line into a different (good) port. </div><div><br></div><div>If the port serving the lobby has been good and tests good then you know you probably have a problem with the cabling between the switch and the lobby "technology outlet". And so on. Bracketing your testing to isolate what is good and what is not. There are, of course ways to use electronics to test and measure the quality of the ethernet cables installed in the building. It can sometimes be good to have all this testing and documented as a baseline for your records but maybe that's not affordable in this situation.</div><div><br></div><div>Hope that helps.</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br><div><div><div class="h5"><div>On Jun 24, 2016, at 12:20 PM, Christian Einfeldt wrote:</div><br></div></div><blockquote type="cite"><div><div class="h5"><div dir="ltr"><span style="font-size:12.8px">Hi,</span><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Here are my questions:</div><div style="font-size:12.8px"><ol style="font-size:12.8px"><li style="margin-left:15px">Why did my <span>speed</span> tests fail in this situation?</li><li style="margin-left:15px">Are the ping <span>speeds</span> normal for this situation?</li><li style="margin-left:15px">What diagnostic tests can I run to isolate the slowness on this system?</li></ol><div style="font-size:12.8px">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.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">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.<br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Two of the three shelters have good <span>speed</span> on the Internet that goes to the machines. (The shelters provide the Internet service). </div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">However, the third shelter, called the Mentone, has slow Internet <span>speeds</span> 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.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">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. </div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">The ISP is a good company that does not hate GNU-Linux.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">The ISP asked me to give them a <span>speed</span> test directly from the switch, which is located in the basement. So I ran <span>speed</span> tests in the basement and in the lobby, and was unable to get the <span>speed</span> test to work. <span>Speed</span> test has worked on this machine before. Here are the two results:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Lobby, where the Lubuntu machine is to be located:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$ speedtest-cli</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Retrieving <a href="http://speedtest.net/" target="_blank">speedtest.net</a> configuration...</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Could not retrieve <a href="http://speedtest.net/" target="_blank">speedtest.net</a> configuration: timed out</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$ ifconfig</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">eth0 Link encap:Ethernet HWaddr 20:1a:06:04:64:42 </span></div><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"> inet addr:172.16.2.121</span><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">basement, directly from the switch:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$ speedtest-cli</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Retrieving <a href="http://speedtest.net/" target="_blank">speedtest.net</a> configuration...</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Could not retrieve <a href="http://speedtest.net/" target="_blank">speedtest.net</a> configuration: timed out</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$</span></div><div><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><br></span></div></div><div style="font-size:12.8px"><font size="4"><b><u>My first question</u>: </b></font>I am not sure why this <span>speed</span> test failed. Does anyone know?</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Since I couldn't run speedtest, I pinged google instead. Here are the results from the lobby:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$ ping <a href="http://www.google.com/" target="_blank">www.google.com</a></span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">PING <a href="http://www.google.com/" target="_blank">www.google.com</a> (216.58.192.4) 56(84) bytes of data.</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">64 bytes from <a href="http://nuq04s29-in-f4.1e100.net/" target="_blank">nuq04s29-in-f4.1e100.net</a> (216.58.192.4): icmp_seq=1 ttl=52 time=8.24 ms</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">64 bytes from <a href="http://nuq04s29-in-f4.1e100.net/" target="_blank">nuq04s29-in-f4.1e100.net</a> (216.58.192.4): icmp_seq=2 ttl=52 time=7.31 ms</span></div><div><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><snip></span></div><div><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><br></span></div><div><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;vertical-align:baseline;background-color:transparent">--- <a href="http://www.google.com/" target="_blank">www.google.com</a> ping statistics ---</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;vertical-align:baseline;background-color:transparent">16 packets transmitted, 12 received, 25% packet loss, time 15037ms</span></div><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"></p><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;vertical-align:baseline;background-color:transparent">rtt min/avg/max/mdev = 6.962/7.497/8.198/0.366 ms</span></div><div><span style="font-size:14.6667px;vertical-align:baseline;background-color:transparent"><br></span></div></span></div></div><div style="font-size:12.8px">Here is the test from the basement:</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$ ping <a href="http://www.google.com/" target="_blank">www.google.com</a></span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">PING <a href="http://www.google.com/" target="_blank">www.google.com</a> (216.58.192.4) 56(84) bytes of data.</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">64 bytes from <a href="http://nuq04s29-in-f4.1e100.net/" target="_blank">nuq04s29-in-f4.1e100.net</a> (216.58.192.4): icmp_seq=1 ttl=52 time=8.24 ms</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">64 bytes from <a href="http://nuq04s29-in-f4.1e100.net/" target="_blank">nuq04s29-in-f4.1e100.net</a> (216.58.192.4): icmp_seq=2 ttl=52 time=7.31 ms</span></div><div><font color="#000000" face="Arial"><span style="font-size:14.6667px;white-space:pre-wrap"><snip></span></font></div><div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">--- <a href="http://www.google.com/" target="_blank">www.google.com</a> ping statistics ---</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">11 packets transmitted, 11 received, 0% packet loss, time 10015ms</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">rtt min/avg/max/mdev = 7.022/7.816/8.519/0.451 ms</span></div><div style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">cje@cje-ultralap440:~$ </span></div><div><span style="font-size:14.6667px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><br></span></div><div><font color="#000000" face="Arial"><span style="white-space:pre-wrap"><font size="4"><u>My second question</u>:</font> Are these ping <span>speeds</span> normal?</span></font></div><div><font color="#000000" face="Arial"><span style="white-space:pre-wrap"><br></span></font></div><div><font color="#000000" face="Arial"><span style="white-space:pre-wrap"><font size="4">My third question:</font> What can I do to find the problem with the system?</span></font></div><div><font color="#000000" face="Arial"><span style="white-space:pre-wrap"><br></span></font></div><div>Thanks! </div></div></div></div><div><br></div>-- <br><div data-smartmail="gmail_signature">Christian Einfeldt</div> </div></div></div><span class=""> -- <br>Ubuntu-us-ca mailing list<br><a href="mailto:Ubuntu-us-ca@lists.ubuntu.com" target="_blank">Ubuntu-us-ca@lists.ubuntu.com</a><br></span><span class="">Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-ca" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-ca</a><br></span></blockquote></div><br><div> <span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div style="word-wrap:break-word"><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div style="word-wrap:break-word"><div>--</div><div>Mark Weisler 'This message has been signed using strong encryption for your protection.'<br>PGP Key ID 68E462B6<br>PGP Key fingerprint 87D5 A77B FC47 3CC3 DFF0 586D 23FF F8B4 68E4 62B6</div><div><br></div></div></span><br></div></span><br></span><br> </div> <br></div></div><br>--<br> Ubuntu-us-ca mailing list<br> <a href="mailto:Ubuntu-us-ca@lists.ubuntu.com">Ubuntu-us-ca@lists.ubuntu.com</a><br> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-ca" rel="noreferrer" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-ca</a><br> <br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">Christian Einfeldt</div> </div>