My 70-persistent-net.rules looks like this:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:22:36:97:f9", ATTR{type}=="1", KERNEL=="eth*", NAME="lan4"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:e0:29:37:0e:78", ATTR{type}=="1", KERNEL=="eth*", NAME="wifi"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:e0:4c:20:59:10", ATTR{type}=="1", KERNEL=="eth*", NAME="ccast"

Don't know if that is the secret sauce to make yours rename.


cat /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="50:7b:9d:0b:8a:ab", NAME="external"
SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="00:0e:c6:dc:01:aa", NAME="internal"


One odd result of running udevadm test on the "external" interface:

enp1s0: Failed to rename network interface 2 from 'enp1s0' to 'external': Device or resource busy

There must be some trick here that I'm missing. What's the problem with the FC31 kernel ?


I tried net.ifnames=0. That resulted in interface names eth0 and eth1. And did not honor the persistent name request.

udevadm finds the file :

SYSTEMD_LOG_LEVEL=debug udevadm test-builtin net_setup_link /sys/class/net/eth0
Successfully loaded SELinux database in 1.572ms, size on heap is 331K.
Trying to open "/etc/systemd/hwdb/hwdb.bin"...
Trying to open "/etc/udev/hwdb.bin"...
=== trie on-disk ===
tool version:          243
file size:         9955651 bytes
header size             80 bytes
strings            2118107 bytes
nodes              7837464 bytes
Load module index
Found container virtualization none.
Network interface NamePolicy= disabled on kernel command line, ignoring.
timestamp of '/etc/systemd/network' changed
Parsed configuration file /usr/lib/systemd/network/
Parsed configuration file /etc/systemd/network/
Parsed configuration file /etc/systemd/network/
Created link configuration context.
eth0: Config file /etc/systemd/network/ is applied
ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
eth0: Failed to query name_assign_type: Invalid argument
eth0: Policies didn't yield a name, using specified Name=external.
Unload module index
Unloaded link configuration context.

but still the interface name is not changed!

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