Ethernet won't connect. [Solved]

alechiko · Last edited by alechiko on Wed Dec 22, 2010 8:51 pm; edited 1 time in total

Just a little bit of background. Internet stopped working few days ago. ISP said its the gateway (modem/router combo) causing the problem. I reverted to the old gateway that they provided. It's called ROTAL RTA 1025w. Now the modem can connect, and the internet is back. While configuring the router at first, wireless wasnt working, and i was connected via ethernet on my laptop. The two switched places, and now wireless works and ethernet doesnt.

As far as i can make out, the default settings on the router should mean ethernet will work, and there are two computers connected to 2 ports on the router by cable, and they work. (Ive also checked the cable im using on the laptop in question and swapping it has had no effect).

My setup;

cbx550f · Posted: Tue Dec 21, 2010 11:41 pm Post subject:

Check your /etc/conf.d/net file to see how eth1 is set (normally the default for one wired adapter is eth0, you are correct, but several things can cause it to end up as eth1 instead - most commonly if you have changed the network adapter) -it's fine, so long as you have net.eth1 set up right!

I'm not familiar with the gui tools for gnome, but a quick thing to try is running "/etc/init.d/net.eth1 start" from a console - if that does it, do an "rc-update add net.eth1 default" (might want to do this before changing any settings in the /etc/conf.d/net

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genterminl · Posted: Wed Dec 22, 2010 12:05 am Post subject:

I can't help much with the networking side of things, but I know udev will change names of things if it thinks a device has changed, saving the old name for the old device. If this is what happened, you should get back to the original names by deleting (save a copy first) /etc/udev/rules.d/70-persistent-net.rules.

alechiko · Posted: Wed Dec 22, 2010 8:50 pm Post subject:

I considered both of the suggestions made here. Checked in /etc/conf.d/net didn't find anything i believed needed to be changed, thanks for the input all the same

Regarding the udev suggestion, removing the 70-persistent-net.rules (after backing up of course) and merging an update to udev with a reboot did fix the problem. I compared the file before and after. There were entries before for eth0, eth1, and wlan0 (all with different mac addresses) and after, just eth0, and wlan0. No idea what the 3rd device was or what it's mac address corresponded to since there are only two network adapters in the computer. Perhaps something virtual? Anyway, works. Thanks!
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