MTR began being installed by default in place of traceroute. If you don't
know mtr, get it in your life. It's usually how I know when cox has
saturation issues at their peering with buffers killing my internet, and
replaces traceroute in any number of ways.
> mtr google.com
> mtr --report -c 5 google.com
Start: Tue Jan 3 13:11:33 2017
HOST: host Loss% Snt Last Avg Best Wrst StDev
1.|-- fw1.peoria1.unifiedconver 0.0% 5 0.3 0.3 0.2 0.3 0.0
2.|-- ??? 100.0 5 0.0 0.0 0.0 0.0 0.0
3.|-- 100.127.69.154 0.0% 5 9.3 9.1 8.2 10.6 0.7
4.|-- 72.215.229.22 0.0% 5 9.1 11.0 9.1 13.4 2.0
5.|-- langbprj02-ae1.0.rd.la.co 0.0% 5 21.7 21.7 21.2 22.5 0.0
6.|-- 72.14.215.221 0.0% 5 21.1 21.4 21.1 22.1 0.0
7.|-- 216.239.51.33 0.0% 5 22.9 22.0 21.4 22.9 0.5
8.|-- 209.85.246.187 0.0% 5 22.2 21.7 20.6 22.4 0.5
9.|-- 64.233.174.207 0.0% 5 37.3 37.5 36.3 40.8 1.7
10.|-- 209.85.246.39 0.0% 5 36.4 36.8 35.7 37.8 0.7
11.|-- 108.170.243.1 0.0% 5 39.7 36.9 35.5 39.7 1.5
12.|-- 108.170.237.105 0.0% 5 35.9 36.1 35.0 37.6 0.9
13.|-- sfo03s01-in-f206.1e100.ne 0.0% 5 36.7 36.7 35.4 38.2 1.0
-mb
On Tue, Jan 3, 2017 at 12:41 PM, Carruth, Rusty <
Rusty.Carruth@smartm.com>
wrote:
> Excellent step-by-step! +100 upvotes! ;-)
>
>
>
> 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….
>
>
>
> So, “traceroute -n 216.58.194.206”
>
>
>
> 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!
>
>
>
> *From:* PLUG-discuss [mailto:plug-discuss-bounces@lists.phxlinux.org] *On
> Behalf Of *Michael Butash
> *Sent:* Tuesday, January 03, 2017 12:34 PM
> *To:* Main PLUG discussion list
> *Subject:* Re: Offline
>
>
>
> 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).
>
>
> ####
>
> ## Layer 1/2, got link? note "state"
>
>
>
> > ip link
>
>
>
> ## If no link, check cable plugged in for blinky lights
>
>
> ####
>
> ## Layer 3, got ip?
>
>
>
> > ip addr
>
>
>
> ## If no ip, check dhcp on the network
>
> ## Optional: Set static ip for temporary troubleshooting, insert proper
> subnets here:
>
>
>
> ip addr add 192.168.1.100 255.255.255.0 dev eth0
>
> ip route add default 192.168.1.1
>
>
> ####
>
> ## Layer 3, verify arp to gateway
>
>
>
> ip nei | grep `ip route | grep default | awk '{ print $3 }'`
>
>
>
> ## If no arp for gateway, check router/switch network
>
>
> ####
>
> ## Layer 3, ping the gateway (whatever that is for you)
>
>
>
> ping `ip route | grep default | awk '{ print $3 }'`
>
>
>
> ## If no response, check prior steps again
>
>
> ####
>
> ## Layer 3/4, verify resolv.conf dns resolution and life beyond default
> route
>
>
>
> ping google.com
>
>
>
> ## If no dns life outside router, check the router has connectivity to the
> internet
>
>
>
> ####
>
> ## pull up a browser to google.com to test layer 4-7 stuff
>
>
>
> On Tue, Jan 3, 2017 at 9:10 AM, Carruth, Rusty <Rusty.Carruth@smartm.com>
> wrote:
>
> I’ll guess that DHCP server on your router was dead.
>
>
>
> But to know for sure - are all your systems using DHCP, or are some using
> static?
>
>
>
> IF your windows side is set for static, and the Linux side is DHCP, then
> this would be expected - windows works, linux doesn’t.
>
>
>
> 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 ;-)
>
>
>
> Rusty
>
>
>
> *From:* PLUG-discuss [mailto:plug-discuss-bounces@lists.phxlinux.org] *On
> Behalf Of *Michael
> *Sent:* Monday, January 02, 2017 1:42 PM
> *To:* PLUG
> *Subject:* Re: Offline
>
>
>
> I'm back. I just had to reset the router..... but why would that work if
> windows still worked?
>
>
>
> On Mon, Jan 2, 2017 at 11:31 AM, Michael <bmike1@gmail.com> wrote:
>
> The TV server, also linux, is still online. It is part of the same network.
>
>
>
> On Jan 2, 2017 11:22 AM, "Michael" <bmike1@gmail.com> wrote:
>
> 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.
>
>
>
>
>
> --
>
> :-)~MIKE~(-:
>
>
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>
>
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