Hi, On 09/09/2014 03:53 AM, Andy Green wrote: > > > On 9 September 2014 06:40:54 GMT+08:00, Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote: >> I do not have this behaviour on the Cubieboard2, just on my Cubietruck. >> >> I thought it was a problem with the F21 build, but today I am working >> with F19 remix: >> >> http://docs.cubieboard.org/tutorials/cb2/installation/cb2_fedora_19_card_install >> >> And I keep getting a different MACaddr. This makes it really hard to >> use persistant.rules to control things based on MACaddr. >> >> Is this just my particular Cubietruck? I remember Hans talking about >> since there is no eeprom, he has to use SID as the basis for the >> MACaddr. >> >> Is there anyway for me to set the MACaddr. It is eating up all my dhcp >> >> addresses. > > There are rules for what constitutes a valid mac address, if yours in invalid the kernel driver will assign you a random one, and then it looks like a new machine every time. > > You can force the mac address in userland /etc/rc.d/rc.local using /sbin/nameif + /etc/mactab, it's dirty but it will get you out of the hole if it runs before the dhclient action poisons your dhcp server. > > If the network driver uses phylib, there is a generic Device Tree name you can use like this inside the ethernet stanza to force it > > local-mac-address = [ aa bb cc dd ee ff ]; > > if so, you can think about adding / overriding that DT node in U-Boot before passing to kernel. > > I sent patches on lkml to improve this a couple of years ago (for Panda, which has no nonvolatile config onboard) by replacing an invalid MAC with computing a consistent per-board MAC from CPU serial ID but The Powers That Be felt it should be fixed by the distros... which as you see... This has been solved in u-boot in the mean time, u-boot now a days calculates a unique mac derived from the CPU serial id, and passes this to the kernel. Regards, Hans _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/arm
