Description: Typically, a VLAN capable switch port has one of three modes: access, trunk, or hybrid. In access mode, the port sends frames in clear format (untagged). In trunk mode, all outbound frames are translated into the switch port's configured trunking format.

In hybrid mode, it is possible for a port to send trunked frames for some VLANs and clear frames for others. In this case, the switch port is configured to trunk, and the virtual switch port(s) for those VLANs that require clear formatted frames are configured to be override the switch port setting. This is done by setting this object to clear(1).

By default, the value of this object is trunkingFormat(2) which means to use the trunking format configured for this switch port. (which may be clear).