Why does a VLAN interface fail to come up with the error message "Connection 'bond0.123' is not available on device bond0.123 because device is strictly unmanaged"?

Solution Verified - Updated -

Issue

  • Unable to bring up VLAN interface in NetworkManager
  • journalctl log output shows the following: Connection 'bond0.123' is not available on device bond0.123 because device is strictly unmanaged

Environment

  • Red Hat Enterprise Linux 7
  • Mixed use of NetworkManager and network.service (with some ifcfg files containing NM_CONTROLLED=no and some not)

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content