Operation Manual – DLDPH3C S3100 Series Ethernet Switches Chapter 1 DLDP Configuration1-11z The interval for sending advertisement packets ranges from 1 to 100 seconds anddefaults to 5 seconds. You can adjust this setting as needed to enable DLDP torespond in time to link failures. If the interval is too long, STP loops may occurbefore unidirectional links are terminated; if the interval is too short, network trafficmay increase in vain and available bandwidth decreases. Normally, the interval isshorter than one-third of the STP convergence time, which is generally 30seconds.z DLDP does not process any LACP event, and treats each link in the aggregationgroup as independent.z When connecting two DLDP-enabled devices, make sure the software running onthem is of the same version. Otherwise, DLDP may operate improperly.z When you use the dldp enable/dldp disable command in system view toenable/disable DLDP on all optical ports of the switch, the configuration takeseffect on the existing optical ports, instead of those added subsequently.z Make sure the authentication mode and password configured on both sides arethe same for DLDP to operate properly.z When DLDP works in enhanced mode, the system can identify two types ofunidirectional links: one is caused by fiber cross-connection and the other iscaused by one fiber being not connected or being disconnected.z When DLDP works in normal mode, the system can identify unidirectional linkscaused by fiber cross-connection.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 detected, so as to reduce theinfluence of mistaken reports.1.3.2 Resetting DLDP StateYou can reset the DLDP state for the ports shut down by DLDP due to unidirectionallinks to enable DLDP detection again.Note:This function is only applicable to ports that are in DLDP down state.
