1-10Setting the Interval for Sending Advertisement PacketsYou can set the interval for sending Advertisement packets to enable unidirectional links to be detectedin time.Follow these steps to set the interval for sending Advertisement packets:To do… Use the command… RemarksEnter system view system-view —Set the interval forsending Advertisementpacketsdldp interval timeOptional5 seconds by defaultThe interval for sending Advertisementpackets applies to all the DLDP-enabled ports.z Set the interval for sending Advertisement packets to a value not longer than one-third of the STPconvergence time. If the interval is too long, STP loops may occur before unidirectional links aretorn down, and it takes a long time for the device to detect unidirectional links, thus causing moretraffic forwarding errors; if the interval is too short, unnecessary Advertisement packets can begenerated to consume bandwidth. Therefore, you are recommended to use the default value.z To enable DLDP to operate properly, make sure the intervals for sending Advertisement packetson both sides of a link are the same.Setting the DelayDown TimerOn some ports, when the Tx line fails, the port goes down and then comes up again, causing opticalsignal jitters on the Rx line. When a port goes down due to a Tx failure, the device transits to theDelayDown state instead of the Inactive state to prevent the corresponding neighbor entries from beingremoved. In the same time, the device triggers the DelayDown timer. If the port goes up before the timerexpires, the device restores the original state; if the port remains down when the timer expires, thedevices transits to the Inactive state.Follow these steps to set the DelayDown timerTo do… Use the command… RemarksEnter system view system-view —Set the DelayDown timer dldp delaydown-timer timeOptional1 second by defaultDelayDown timer setting appliesto all the 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.
