On Friday, October 4, 2013 1:11:48 PM UTC-4, synko...@gmail.com wrote: > > > so from what i see is impossible to scale an image flashing to multiple > BBB without setting the eth interface... is it correct? > >
When Linux boots up, it assigns loads the various network drivers for each network device and assigns names "randomly" IE eth0 is the FIRST ethernet device to initialize. eth1 is the SECOND ethernet device to initialize. Etc. Because some people depend on eth0 always being assigned to the SAME network card, there are a number of different "systems" in place for linux to force this to occur. Most of them revolve around using a program called udev can detect very specific information about the card[mac address, hardware id, etc] and then force the name to be assigned that you want. See http://www.linuxfromscratch.org/blfs/view/development/chapter07/network.html for details. This means if you take a "working" image of linux from one machine and copy it to another machine, eth0 can ONLY be assigned to the network interface from the original machine. So on your second machine, you may end up with eth1 instead of eth0 or none at all! Depending on what distribution of linux you use[Ubuntu, Debian, Angstrom, Arch, etc] AND what version you are using - there will be installed some shell scripts that when you boot the system up will 1) Check to see if network interface configuration file exists[the file which defines MAC Address N should be called eth0] 2) If the file does not exist, it will automatically create one using the current configuration. This means that you cannot "copy" an entire linux installation from one system and put it on another. You have to delete the network configuration file that was automatically generated, so that a new one will become automatically generated on the new system. Other alternatives are to delete that file AND to disable those programs which automatically generate new files and just live with the possibility of "random" network device names. The "difference" your referring to is that many of the different devices on the board are assigned unique serial numbers. The hardware is identical, it is the serial number which changes. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
