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I think this is your problem:
NetworkManager-wait-online.service disabled
This should be enabled by default on rhel7, so either you have disabled that manually or there is an issue with preset policy (redhat-release package).
You are correct, the problem was in *preset* policy of NetworkManager-wait-online.service (compose RHEL-7.5-20180208.1).
$ systemctl status NetworkManager-wait-online.service
...
Loaded: loaded (/usr/lib/systemd/system/NetworkManager-wait-online.service; disabled; vendor preset: disabled)
...
This is fixed in redhat-release-server-7.5-6.el7 package:
- https://bugzilla.redhat.com/show_bug.cgi?id=1540243
- http://pkgs.devel.redhat.com/cgit/rpms/redhat-release-server/commit/90-default.preset?h=rhel-7.5&id=fef0e2556c5460e068f44e888982e0643b8b27d9
$ 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; vendor preset: enabled)
$ grep NetworkManager-wait-online.service /usr/lib/systemd/system-preset/*
/usr/lib/systemd/system-preset/90-default.preset:enable NetworkManager-wait-online.service
$ rpm -qf /usr/lib/systemd/system-preset/90-default.preset
redhat-release-server-7.5-6.el7.x86_64
The IPsec IPv4 and IPv6 tunnels are now started automatically after boot. I
cannot reproduce this problem anymore.
Closing this as a duplicate of BZ1540243.
Thanks!
*** This bug has been marked as a duplicate of bug 1540243 ***