Enable/Disable L2PT point-to-point protocols on the port. The switch supports PAgP (Port Aggregation Protocol),
LACP (Link Aggregation Control Protocol) and UDLD (UniDirectional Link Detection) tunneling for a point-to-point topology.
Both PAgP and UDLD are Cisco's proprietary data link layer protocols. PAgP is similar to LACP and used to set up a logical
aggregation of Ethernet ports automatically. UDLD is to determine the link's physical status and detect a unidirectional link.