- When set to nonTrunk, the port negotiates and converts the link into
non-trunking mode. This port and the peer port's OperTrunkMode
will not carry multiple VSAN traffic.
- When set to trunk, the port negotiates and converts the link into
trunking mode only if the peer port is trunk or auto.
- When set to auto, the port is willing to convert the link to a trunk
link only if the peer port is trunk or auto.