Learning OpenStack Networking - Third Edition

Defining the workflow

Trunking in OpenStack Networking introduces some concepts that are important to the workflow needed when attaching trunks to an instance. Those concepts include the following:

• Trunks
• Parent ports
• Sub-ports

A trunk is an object that binds a parent port to sub-ports.

A parent port is a port that is attached to the instance and represents the trunk link from within the guest operating system. The interface looks and feels like a normal interface and inherits the MAC and IP addresses of the parent port. Any traffic sent over the associated interface inside the guest operating system is considered untagged and follows normal Neutron port behavior.

A sub-port is associated with a network and subnet and is not directly attached ...