ifconfig not showing my networks

prakhar · Posted: Sat Sep 27, 2014 6:02 am Post subject: ifconfig not showing my networks

Hello everyone,

I just completed the installation of my Gentoo system. When I rebooted to my kernel, I was shocked to see my interfaces were not there. The only interface it shows is lo interface. I executed these commands for my interfaces:-

$ cd /etc/init.d
$ ln -s net.lo net.enp8s0
$ ln -s net.lo net.wlp2s0
$ rc-update add net.enp8s0 default
$ rc-update add net.wlp2s0 default

I also tried to do

$ service net.enp8s0 start

But, it fails with error:

ERROR: interface enp8s0 does not exists
Ensure that you have loaded the correct kernel module for your hardware
ERROR: net.enp8s0 failed to start

They were working just fine when I was working on livecd.

Please help.
_________________
Just another linux user

charles17 · Advocate Joined: 02 Mar 2008 Posts: 3664

Are you having the drivers correctly installed?
https://wiki.gentoo.org/wiki/Ethernet might help.

If you installed them as modules check with lsmod
Also, https://wiki.gentoo.org/wiki/Network_management_using_DHCPCD will show you a much easier setup for network.

Roman_Gruber · Posted: Sat Sep 27, 2014 10:35 am Post subject:

well.

this is mostly a kernel related issue.

post your kenrel version here and than post to a pastebin your full kernel config and post the link than here.

also check the gentoo wiki / handbook about configuring the kernel regarding network.

also run lspci on a livecd, write all down, those codes xxxx:xxxx or using lsmod can be used to find the needed modules

lsmod should return you on a livecd which modules are loaded, but you are better of using lspci and google for those xxxx:xxxx codes to see what you need in your kernel

and also => ifconfig -a <= reveals all when you have a proper configured kernel.

also lshw could be helpful on a working installation

Roman_Gruber · Posted: Sat Sep 27, 2014 10:36 am Post subject:

output of

lspci

ifconfig -a

lsmod

if you want old network names, or let it called the regular ones like eth0 and so on...

prakhar · Posted: Sun Sep 28, 2014 6:09 am Post subject:

Actually, I wasn't sure what features to enable while I was configuring my kernel. I followed Gentoo Handbook and enabled all features it quoted out and nothing more. Never thought I need to enable my NICs explicitly.

My Ethernet card was Realtek RTL 8101E/8102E PCI Fast Express, for which (after googling) I found that RTL8169 may do the job.

My wifi card is Intel Pro Wireless 3945ABG, for which I needed to enable iwl3945 driver.

I enabled both of them, recompiled my kernel, and now I have both of my cards working. Thanks @charles17 for letting me know about enabling my net drivers explicitly. By the way, I am using kernel 3.14.14. Having a problem with udev and X11 now, thinking about starting a new thread.
_________________
Just another linux user

Roman_Gruber · Posted: Sun Sep 28, 2014 9:52 am Post subject:

gentoo need some special flags and hterefore gentoo sources are recommended.

for udev there is also a guide around.

same for x11 and how to configure, its the same procedure. figure out what you have and than search for guides what to enalbe / build

Hu · Moderator Joined: 06 Mar 2007 Posts: 21630