1-11z Manual mode. This mode applies to networks with low performance, where normal links may betreated as unidirectional links. It protects service packet transmission against false unidirectionallinks. In this mode, DLDP only detects unidirectional links and generates log and traps. Theoperations to shut down unidirectional link ports are accomplished by the administrator.z Auto mode. In this mode, when a unidirectional link is detected, DLDP transits to Disable state,generates log and traps, and set the port as 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 mode.z If the device is busy, or the CPU utilization is high, normal links may be treated as unidirectionallinks. In this case, you can set the port shutdown mode to manual mode to eliminate the effectscaused by false unidirectional link report.Configuring DLDP AuthenticationFollow these steps to configure DLDP authentication:To do… Use the command… RemarksEnter system view system-view —Configure DLDPauthenticationdldp authentication-mode { md5md5-password | none | simplesimple-password }Requirednone by defaultTo enable DLDP to operate properly, make sure the DLDP authentication modes and the passwords ofthe both sides of a link are the same.Resetting DLDP StateAfter DLDP detects a unidirectional link on a port, the port enters Disable state. In this case, DLDPprompts you to shut down the port manually or shuts down the port automatically depending on the
