Naming networkinterfaces using udev: Difference between revisions

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To find the information available for the different networkinterfaces (and all other devices) use "udevinfo". For 'eth0' execute the following command:
To find the information available for the different networkinterfaces (and all other devices) use "udevinfo". For 'eth0' execute the following command:
  udevinfo -a -p /sys/class/net/eth0
  udevinfo -a -p /sys/class/net/eth0
on newer systems use
udevadm info -a -p /sys/class/net/eth0


All devices available on the system are found in the '/sys' file system, and can be listed using "udevinfo".  
All devices available on the system are found in the '/sys' file system, and can be listed using "udevinfo".  

Revision as of 16:59, 19 January 2012

Naming networkinterfaces using udev

Usually the robots are configured to use DHCP at networkinterface 'eth0' and have a static IP (10.0.1.2) at interface 'eth1'. In order to get the wireless PCMCIA netcard to use DHCP we want to rename it to 'eth0'. This can be achieved by using the udev system. Changes are done in the file

/etc/udev/rules.d/75-network-devices.rules

Add the following two lines:

SUBSYSTEMS=="pci", DRIVERS=="via-rhine", NAME="eth1"
SUBSYSTEMS=="pci", DRIVERS=="yenta_cardbus", NAME="eth0"

Remove any conflicting lines.

Jetway Atom boards

The approach above will work on the VIA based motherboards used at the SMRs. The new Intel Atom based motherborads from Jetway uses a Realtek network controller. Therefore change the line

SUBSYSTEMS=="pci", DRIVERS=="via-rhine", NAME="eth1"

to

SUBSYSTEMS=="pci", DRIVERS=="r8168", NAME="eth1"

to achieve the same on the Jetway motherboards.

Further information

To find the information available for the different networkinterfaces (and all other devices) use "udevinfo". For 'eth0' execute the following command:

udevinfo -a -p /sys/class/net/eth0

on newer systems use

udevadm info -a -p /sys/class/net/eth0

All devices available on the system are found in the '/sys' file system, and can be listed using "udevinfo". All udev rules are found in

/etc/udev/rules.d

The files in this directory are parsed in lexical order.