1-4When you configure a DLDP authentication mode and authentication password on a port, make surethat the same DLDP authentication mode and password are set on the ports connected with a fibercable or copper twisted pair. Otherwise, DLDP authentication fails. DLDP cannot work before DLDPauthentication succeeds.Related commands: dldp unidirectional-shutdown.Examples# Set the DLDP authentication mode and password to plain text and abc respectively on the portsconnected with a fiber cable or copper twisted pair between Switch A and Switch B.z Configure Switch A system-viewSystem View: return to User View with Ctrl+Z.[SwitchA] dldp authentication-mode simple abcz Configure Switch B system-viewSystem View: return to User View with Ctrl+Z.[SwitchB] dldp authentication-mode simple abcdldp intervalSyntaxdldp interval timer-valueundo dldp intervalViewSystem viewParameterstimer-value: Interval between sending advertisement packets in seconds, in the range of 1 to 100. It is 5by default.DescriptionUse the dldp interval command to set the interval between sending advertisement packets for allDLDP-enabled ports in the advertisement state.Use the undo dldp interval command to restore the interval to the default value.By default, the interval between sending advertisement packets is 5 seconds.A device in Advertisement state periodically sends out Advertisement packets to notify the neighbors ofits existence. Meanwhile, the device also retrieves neighbor information from the receivedAdvertisement packets and maintains its own neighbor entries. When the device receives anAdvertisement packet from a device that does not match any of its neighbor entries, it transits fromAdvertisement state to Probe state and sends DLDP Probe packets to detect unidirectional links.Note that:z The interval takes effect on all DLDP-enabled ports.z It is recommended that you set the interval shorter than one-third of the STP convergence time(usually 30 seconds). If too long an interval is set, an STP loop may occur before DLDP shuts down
