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IPv4 is not showing, current Ubuntu build says "Failed to start Raise network interfaces"

Posted on July 3, 2018

Hi, I have a droplet with IPv4 and IPv6 enabled. It has never been a problem. However, yesterday I somehow managed to break my droplet while upgrading. IPv6 looks fine but IPv4 is now missing from my IP if I run $ip addr .

I can access the DO console to test, but cannot ssh in or ping from my terminal.

$cat /etc/network/interfaces.d/* looks the same as an older snapshot (too old unfortunately). Changing network interfaces has yet to produce anything encouraging. My firewall is disabled. Not sure where else to look.

$sudo reboot shows the error: "Failed to start Raise network interfaces".

DO support has responded and recommended the following:

$ ip addr
learned that inet6 displays, inet not present
$ ip route
no change
$ ls -l /lib/modules
total 8
drwxr-xr-x 5 root root 4096 Jun 13 07:00 4.4.0-128-generic
drwxr-xr-x 5 root root 4096 Jul 2 13:51 4.4.0-130-generic
$iptables -nvL --line-numbers
empty

and lastly removing /etc/udev/rules.d/70-persistent-net.rules results in no change.

As per support I learned that IPv4 is not present. Support suggested “ensuring IPv4 is present” although I’m not sure how to go about accomplishing that.

Hopefully someone out here can throw me a bone, it has been a long night.

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