1-11To do… Use the command… RemarksEnter system view system-view —Set the DelayDown timer dldp delaydown-timer time Optional1 second by defaultDelayDown timer setting applies to all DLDP-enabled ports.Setting the Port Shutdown ModeOn detecting a unidirectional link, the ports can be shut down in one of the following two modes.z Manual mode. This mode applies to low performance networks, where normal links may be treatedas unidirectional links. It protects data traffic transmission against false unidirectional links. In thismode, DLDP only detects unidirectional links and the DLDP state machine generates log and trapsto prompt you to manually shut down unidirectional link ports with the shutdown command. TheDLDP state machine transits to the Disable state only after you manually shut down unidirectionallink ports with the shutdown command.z Auto mode. In this mode, when a unidirectional link is detected, DLDP transits to Disable state,generates log and traps, and sets the port state to DLDP Down.Follow these steps to set port shutdown mode:To do… Use the command… RemarksEnter system view system-view —Set port shutdown mode dldp unidirectional-shutdown{ auto | manual }Optionalauto by defaultz On a port with both remote OAM loopback and DLDP enabled, if the port shutdown mode is automode, the port will be shut down by DLDP when it receives a packet sent by itself, causing remoteOAM loopback to operate improperly. To prevent this, you need to set the port shutdown mode toauto.z If the device is busy, or the CPU usage is high, normal links may be treated as unidirectional links.In this case, you can set the port shutdown mode to manual mode to alleviate the impact caused byfalse unidirectional link report.
