Unless the setting 'Ignore Puppet facts for provisioning' is set to 'Yes', foreman updates the hosts interface information based on Puppet facts. With facter version >= 3.0, a virtual interface is currently incorrectly
classified as being physical and its name overwrites the name of the physical interface to which it is attached in the foreman database.

Foreman parses the interface name in order to distinguish between physical andvirtual interfaces. For virtual interfaces, this feature currently only works correctly with facter versions < 3.0 because it relies on:

• facter replacing the . (dot) and : (colon) in the interface name with an _ (underscore), which does not happen anymore with facter >=3. https://tickets.puppetlabs.com/browse/FACT-1762 https://tickets.puppetlabs.com/browse/FACT-775
• the 'vlans' fact, which has been removed as of facter 3.0 https://docs.puppet.com/facter/3.0/release_notes.html