RHEL 7 syslog shows failure related to network.service

Issue

• syslog shows the following error messages indicating that network.service entered failed state yet there seems to be no functionality loss as the network interface has an active and accesible IP address.

Mar 13 12:17:48 localhost NetworkManager[908]: <warn> Failed to activate 'em1': Connection 'em1' is not available on the device em1 at this time.
Mar 13 12:17:48 localhost network: Bringing up interface em1:  Error: Connection activation failed: Connection 'em1' is not available on the device em1 at this time.
Mar 13 12:17:48 localhost network: [FAILED]
Mar 13 12:17:48 localhost systemd: Failed to start LSB: Bring up/down networking.
Mar 13 12:17:48 localhost systemd: Unit network.service entered failed state.