Description: The trunking mode of this port. All frames transmitted out this switch port are translated to the appropriate trunking format:

Clear: Ethernet or IEEE 802.3 frame format. This is the default. IEEE 802.1Q: The original frame with a new Ethernet Type (Protocol = 0xXXXX) and the VLAN ID inserted following the original Source Address. Also, the CRC is recalculated. Multi-level: The original frame is encapsulated in an IEEE 802.3 legal frame proprietary to a major networking equipment vendor. 3Com LinkSwitch: The original frame has the VLAN ID added to the front of the frame (before the Destination Address). Trunking format is proprietary to 3Com Corporation.