1-10z Enhanced mode: In this mode, DLDP actively detects neighbors when the corresponding neighborentries age out. The system can thus identify two types of unidirectional links: cross-connectedfibers and disconnected fibers.Follow these steps to set DLDP mode:To do… Use the command… RemarksEnter system view system-view —Set DLDP mode dldp work-mode { enhance |normal }OptionalNormal by defaultSetting the Interval for Sending Advertisement PacketsDLDP detects unidirectional links by sending Advertisement packets. To ensure that DLDP can detectunidirectional links in time without affecting network performance, you need to set the advertisementinterval appropriately depending on your network environment. Typically, the interval should be setshorter than one third of the STP convergence time. If the interval is set too long, STP loops may occurbefore unidirectional links are detected and shut down. If the interval is set too short, the number ofadvertisement packets will increase. In most cases, you are recommended to use the default.Follow these steps to set the interval for sending Advertisement packets:To do… Use the command… RemarksEnter system view system-view —Set the interval forsending Advertisementpacketsdldp interval time Optional5 seconds by defaultz The interval for sending Advertisement packets applies to all DLDP-enabled ports.z To enable DLDP to operate properly, make sure the intervals for sending Advertisement packetson both sides of a link are the same.Setting the DelayDown TimerOn some ports, when the Tx line fails, the port goes down and then comes up again, causing opticalsignal jitters on the Rx line. When a port goes down due to a Tx failure, the device transits to theDelayDown state instead of the Inactive state to prevent the corresponding neighbor entries from beingremoved. In the same time, the device triggers the DelayDown timer. If the port goes up before the timerexpires, the device restores the original state; if the port remains down when the timer expires, thedevices transits to the Inactive state.Follow these steps to set the DelayDown timer
