Operation Manual – DLDPH3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration1-12Note:z When you use the dldp enable/dldp disable command in system view toenable/disable DLDP globally on all optical ports of the switch, this command is onlyvalid for existing optical ports on the device, however, it is not valid for those addedsubsequently.z DLDP can operate normally only when the same authentication mode andpassword are set for local and peer ports.z When the DLDP protocol works in normal mode, the system can identify only onetype of unidirectional links: cross-connected fibers.z When the DLDP protocol works in enhanced mode, the system can identify twotypes of unidirectional links: the first type is the cross-connected fiber, and thesecond type is one of the two fibers is not connected or fails.z When the device is busy with services and the CPU utilization is high, DLDP mayissue mistaken reports. You are recommended to configure the operating mode ofDLDP as manual after unidirectional links are discovered.z For the dldp interval integer command, make sure that the same interval fortransmitting advertisement packets is set on the ports used to connected bothdevices; otherwise DLDP will not operate properly.1.3.2 Resetting DLDP StatusNote:Only after the ports are DLDP down due to the detection of unidirectional links can youuse the dldp reset command to reset the DLDP status of these ports to retrieve DLDPprobes.Follow these steps to reset DLDP status:To do… Use the command… RemarksEnter system view system-view —Reset the status of DLDP globally dldp reset Optional
