[systemd-devel] failed to change interface name (systemd-networkd)

[James]

Hello,

Hoping someone can point me in the right direction. I'm attempting to
change the interface name (eth0 -> wired) on one of my servers.

Here's the output from the journal:

~# journalctl --no-pager | grep -i wired
Sep 23 17:11:15 vivid systemd-udevd[399]: error changing net interface
name 'eth0' to 'wired0': Device or resource busy
Sep 23 17:11:15 vivid systemd-udevd[399]: could not rename interface
'2' from 'eth0' to 'wired0': Device or resource busy
Sep 23 17:11:17 vivid sh[566]: Unknown interface wired0
Sep 23 17:11:17 vivid systemd[1]: Started ifup for wired0.
Sep 23 17:11:17 vivid systemd[1]: Starting ifup for wired0...

Here's what the .link contains:

# cat 10-ethernet.link
[Match]
MACAddress=fa:16:3e:31:7a:4b
[Link]
Name=wired0
MACAddress=fa:15:33:55:33:44

And the .network:

# cat 20-ethernet.network
[Match]
Name=wired*
[Network]
DNS=8.8.8.8
DNS=8.8.4.4
[Address]
Address=10.1.1.190/24
[Route]
Destination=0.0.0.0/0
Gateway=10.1.1.1

The MAC address of the interface changes properly, so I know that the
unit is at least being read and parsed.

As an aside, this is happening on Ubuntu 15.04. I've disabled
NetworkManager and am relying, obviously, on systemd-networkd and
systemd-resolved. I've also temporarily disabled dhcpd thinking that
may have had something to do with the interface being busy, to no
avail.

Any thoughts on why the interface is busy resulting in the name change failing?

Thanks!