CUPS not starting after RHEL reboots

Issue

• CUPS will not start automatically after RHEL reboots, even though it is enabled:

  # systemctl enable cups
  # systemctl start cups
  # systemctl status cups
  cups.service - CUPS Printing Service
     Loaded: loaded (/usr/lib/systemd/system/cups.service; enabled)
     Active: active (running) since Thu 2015-06-25 07:34:03 PDT; 1s ago
   Main PID: 1095 (cupsd)
     CGroup: /system.slice/cups.service
             └─1095 /usr/sbin/cupsd -f
  # reboot
  

  Wait for system to reboot.

  #systemctl status cups
  cups.service - CUPS Printing Service
     Loaded: loaded (/usr/lib/systemd/system/cups.service; enabled)
     Active: inactive (dead)
  

• Running "systemctl enable cups" doesn't make cups start on boot. Running "systemctl start cups" works as expected.