1-9z To ensure unidirectional links can be detected, make sure these settings are the same on the bothsides: DLDP state (enabled/disabled), the interval for sending Advertisement packets,authentication mode, and password.z Keep the interval for sending Advertisement packets adequate to enable unidirectional links to bedetected in time. If the interval is too long, unidirectional links cannot be terminated in time; if theinterval is too short, network traffic may increase in vain.z DLDP does not process any link aggregation control protocol (LACP) events. The links in anaggregation group are treated individually in DLDP.z When connecting two DLDP-enabled devices, make sure the DLDP software version ID fields ofthe DLDP packets exchanged between the two devices are the same. Otherwise, DLDP mayoperate improperly.Enabling DLDPFollow these steps to enable DLDP:To do… Use the command… RemarksEnter system view system-view —Enable DLDP globally dldp enable RequiredGlobally disabled by defaultEnterEthernetport viewinterface interface-typeinterface-numberEnterEthernetport viewor portgroupviewEnter portgroupviewport-group manualport-group-nameEither of the two is required.The configuration performed inEthernet port view applies to thecurrent port only. Theconfiguration performed in portgroup view applies to all the portsin the port group.Enable DLDP dldp enableRequiredDisabled on a port by defaultYou can perform this operation onan optical port or an electrical port.DLDP takes effect only when it is enabled both globally and on a port.Setting DLDP ModeThere are two DLDP modes:z Normal mode: In this mode, DLDP does not actively detect neighbors when the correspondingneighbor entries age out. The system can identify only one type of unidirectional links:cross-connected fibers.z Enhanced mode: In this mode, DLDP actively detects neighbors when the corresponding neighborentries age out. The system can identify two types of unidirectional links: cross-connected fibersand disconnected fibers.Follow these steps to set DLDP mode:
