auto—Configures the ports as auto links. If the link is in full-duplex mode or if link aggregation is enabled on the port, an auto link behaves like a point-to-point link.
broadcast—Configures the ports as broadcast ports. By default, all ports are broadcast links.
point-to-point—Configures the ports for rapid reconfiguration in an RSTP or MSTP environment.
edge—Configures the ports as edge ports. For information about edge safeguard, see Configuring Edge Safeguard.