43Table 16 Description on DLDP neighbor statesDLDP neighbor state DescriptionUnknownA neighbor is in this state when it is just detected and is being probed. Aneighbor is in this state only when it is being probed. It transits to Two way stateor Unidirectional state after the probe operation finishes.Two way A neighbor is in this state after it receives response from its peer. This stateindicates the link is a two-way link.UnidirectionalA neighbor is in this state when the link connecting it is detected to be aunidirectional link. After a switch transits to this state, the correspondingneighbor entries maintained on other devices are removed.DLDP configuration task listComplete the following tasks to configure DLDP:Task RemarksEnabling DLDP RequiredSetting DLDP mode OptionalSetting the interval for sending advertisement packets OptionalSetting the DelayDown timer OptionalSetting the port shutdown mode OptionalConfiguring DLDP authentication OptionalResetting DLDP state OptionalCAUTION:• To ensure that DLDP works properly on a link, you must configure the full duplex mode for the ports attwo ends of the link, and configure a speed for the two ports, rather than letting them negotiate a speed.For more information about the duplex and speed commands, see theLayer 2—LAN SwitchingCommand Reference.• For DLDP to work properly, enable DLDP on both sides and make sure these settings are consistent: theinterval to send Advertisement packets, DLDP authentication mode, and password.• DLDP does not process any link aggregation control protocol (LACP) events. The links in an aggregationare treated as individual links in DLDP.• For DLDP to operate properly, make sure the DLDP version running on devices on the two sides are thesame.Enabling DLDPTo properly configure DLDP on the switch, enable DLDP globally, and then enable it on each port.Follow these steps to enable DLDP:To do… Use the command… RemarksEnter system view system-view —