On Fri, Jan 31, 2020 at 01:31:43PM -0500, Bob Weber wrote: > First I created /etc/systemd/network/10-eth0.link using the MAC address and > the name eth0. If the MAC changes then there are other characteristics to > add to the [Match] section to uniquely define the port (see above link). > > ------- > > root@debian-ZFS ~ # cat /etc/systemd/network/10-eth0.link > [Match] > MACAddress=52:54:00:ea:e3:53 > > [Link] > Name=eth0 > > > Second I linked the default to /dev/null. > > ----- > > link -s /dev/null /etc/systemd/network/99-Default.link
I'm almost 100% sure that should be all lower-case, if you expect it to do anything. The file it's overriding is 99-default.link (lower-case). > Parsed configuration file /usr/lib/systemd/network/99-default.link > Skipping empty file: /etc/systemd/network/99-Default.link It's going to use the 99-default.link file because you didn't actually override it. But since you're mapping explicitly on the MAC address of the interface, it doesn't really matter.