Comment # 13 on bug 904346 from Robin Roevens

(In reply to David Disseldorp from comment #11)
> Is NetworkManager-wait-online.service enabled?
> 
> Please provide the output of:
> # systemctl status NetworkManager-wait-online.service
NetworkManager-wait-online.service - Network Manager Wait Online
   Loaded: loaded (/usr/lib/systemd/system/NetworkManager-wait-online.service;
enabled)
   Active: inactive (dead)

It was disabled at first, but then I enabled it and rebooted again. But it
didn't help.

> 
> and...
> # grep NM_ONLINE_TIMEOUT /etc/sysconfig/network/config
NM_ONLINE_TIMEOUT="30"