Self-contained FreeBSD rc.d script for re-naming devices based on their MAC address. I needed it due to USB Ethernet devices coming up in different orders across OS upgrades.
Copy ethname into /usr/local/etc/rc.d/
USAGE:
Add the following to rc.conf:
ethname_enable="YES"
ethname_<NAME>_mac="aa:bb:cc:dd:ee:ff"
For example:
ethname_enable="YES"
ethname_external_mac="aa:bb:cc:dd:ee:00"
ethname_private_mac="aa:bb:cc:dd:ee:01"
You can optionally restrict handling to a set of defined names with:
ethname_names="external private"
otherwise all defined ethname_*_mac="" values are used
Make sure any interfaces you want to rename have their drivers loaded or
compiled in. If externnal is on axe0, for example, add if_load_axe="YES" to
/boot/loader.conf. See the man page for your device (eg 'man axe') for
particulars.
All other devices are untouched.
Optional rc.conf settings:
ethname_timeout : Maximum wait time for devices to appear. [default=30]
That's it. Use ifconfig_<name>="" settings in rc.conf with the new names.
Supports device name swapping; uses temporary names as part of the process.
This version is has a new simplified interface, but will support the old echname_map and ethname_devices configurations, as well.