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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Excellent step-by-step! +100 upvotes! ;-)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The only thing I’d add is that, if you can get an external IP address (e.g. 204.110.11.131 (inficad.com - don’t ask) or 216.58.194.206 (one possible value for
google.com) and then do a traceroute -n to that address, you can see (without needing DNS) if the packets get out, and how far they get if they don’t get all the way out….<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">So, “traceroute -n 216.58.194.206”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Unfortunately, traceroute is not always installed by default - GO DO THAT NOW!!! ;-) Since when you need it, you won’t be able to get it!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> PLUG-discuss [mailto:plug-discuss-bounces@lists.phxlinux.org]
<b>On Behalf Of </b>Michael Butash<br>
<b>Sent:</b> Tuesday, January 03, 2017 12:34 PM<br>
<b>To:</b> Main PLUG discussion list<br>
<b>Subject:</b> Re: Offline<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Just work your way up the network osi model in troubleshooting. Everyone should learn some networking these days, one way or another (speaking as a bofh network guy that deals with non-networking app and developers folk commonly - don't
be part of the problem).<o:p></o:p></p>
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<p class="MsoNormal"><br>
####<o:p></o:p></p>
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<p class="MsoNormal">## Layer 1/2, got link? note "state"<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">> ip link<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">## If no link, check cable plugged in for blinky lights<o:p></o:p></p>
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<p class="MsoNormal"><br>
####<o:p></o:p></p>
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<p class="MsoNormal">## Layer 3, got ip?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">> ip addr<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">## If no ip, check dhcp on the network<o:p></o:p></p>
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<p class="MsoNormal">## Optional: Set static ip for temporary troubleshooting, insert proper subnets here:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">ip addr add 192.168.1.100 255.255.255.0 dev eth0<o:p></o:p></p>
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<p class="MsoNormal">ip route add default 192.168.1.1<o:p></o:p></p>
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<p class="MsoNormal"><br>
####<o:p></o:p></p>
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<p class="MsoNormal">## Layer 3, verify arp to gateway<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">ip nei | grep `ip route | grep default | awk '{ print $3 }'`<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">## If no arp for gateway, check router/switch network<o:p></o:p></p>
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<p class="MsoNormal"><br>
####<o:p></o:p></p>
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<p class="MsoNormal">## Layer 3, ping the gateway (whatever that is for you)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">ping `ip route | grep default | awk '{ print $3 }'`<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">## If no response, check prior steps again<o:p></o:p></p>
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<p class="MsoNormal"><br>
####<o:p></o:p></p>
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<p class="MsoNormal">## Layer 3/4, verify resolv.conf dns resolution and life beyond default route<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">ping <a href="http://google.com">google.com</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">## If no dns life outside router, check the router has connectivity to the internet<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">####<o:p></o:p></p>
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<p class="MsoNormal">## pull up a browser to <a href="http://google.com">google.com</a> to test layer 4-7 stuff<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Jan 3, 2017 at 9:10 AM, Carruth, Rusty <<a href="mailto:Rusty.Carruth@smartm.com" target="_blank">Rusty.Carruth@smartm.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’ll guess that DHCP server on your router was dead.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">But to know for sure - are all your systems using DHCP, or are some using static?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">IF your windows side is set for static, and the Linux side is DHCP, then this would be expected -
windows works, linux doesn’t.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">But I’m just guessing (however, I had a router once that would lose its DHCP server on a semi-regular
basis. I considered putting it on some sort of auto-reboot device (power cycle it once a day) - finally just replaced the stupid thing ;-)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Rusty</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> PLUG-discuss [mailto:<a href="mailto:plug-discuss-bounces@lists.phxlinux.org" target="_blank">plug-discuss-bounces@lists.phxlinux.org</a>]
<b>On Behalf Of </b>Michael<br>
<b>Sent:</b> Monday, January 02, 2017 1:42 PM<br>
<b>To:</b> PLUG<br>
<b>Subject:</b> Re: Offline</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I'm back. I just had to reset the router..... but why would that work if windows still worked?<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Mon, Jan 2, 2017 at 11:31 AM, Michael <<a href="mailto:bmike1@gmail.com" target="_blank">bmike1@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The TV server, also linux, is still online. It is part of the same network.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Jan 2, 2017 11:22 AM, "Michael" <<a href="mailto:bmike1@gmail.com" target="_blank">bmike1@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am now offline in my Linux box. Windows is up and happy and the modem is up and happy too. Heck, the network connection shows I'm connected too. I don't know what to do. What
led up to this is I was trying something with th faulty SD card. .. grated said to run, chkdsk /f , twice so I boot into Windows to do that ,couldn't do it though. Then when I boot back to Linux to reformat it there was no connectivity.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><br>
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<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">--
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:9.5pt">:-)~MIKE~(-:</span><o:p></o:p></p>
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<p class="MsoNormal"><br>
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