ifconfig does not recognize eth0, only wlan0 and lo (Ubuntu 14.04, Macbrook Pro)

Question

ifconfig -a produces:

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1812 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1812 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:209274 (209.2 KB)  TX bytes:209274 (209.2 KB)

wlan0     Link encap:Ethernet  HWaddr 28:cf:e9:1a:43:cd  
          inet addr:192.168.12.11  Bcast:192.168.12.255  Mask:255.255.255.0
          inet6 addr: fe80::2acf:e9ff:fe1a:43cd/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11512 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11320 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:9240182 (9.2 MB)  TX bytes:2316647 (2.3 MB)

lspci -nn | grep Ethernet produces:

03:00.0 Ethernet controller [0200]: Broadcom Corporation Device [14e4:16a3] (rev 10)

cat /etc/network/interfaces produces:

auto lo

iface lo inet loopback

Any ideas on how I can get eth0? Thanks!

Solution

Check whether your interface has the name eth0 by typing ifconfig -a.

Probably it is named something like p1p1 now. If it is and you want it to be eth0, add biosdevname=0 to the boot options in your /etc/default/grub.

Comments

[bbarker]

Alternatively you can just rename the interface from eth0 to the assigned name in /etc/network/interfaces (p1p1 in your example), assuming the correct configuration information has been added already for eth0 in that file.