H3C S7500 Series Operation Manual
Also see for S7500 Series: Operation manualOperation manualOperation manualOperation manualCommand manual
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Operation Manual – DLDPH3C S7500 Series Ethernet Switches Chapter 1 DLDP Configuration1-13To do… Use the command… RemarksEnter Ethernet portviewinterface interface-typeinterface-number —Reset the status ofDLDP on 100 MEthernet portsdldp resetReset thestatus ofDLDP on aport Reset the status ofDLDP on GigabitEthernet portsdldp resetOptionalCaution:z This command only applies to the ports in DLDP down status.z If a port is DLDP down, it can return to the up state automatically. You do not need toreset DLDP on the port.1.3.3 Precautions During DLDP Configurationz DLDP does not work on a port where you configure duplex and rate forcibly, suchas 10 GE port.z DLDP works only when the link is up.z To insure that DLDP neighbors can be established properly and unidirectionallinks can be detected, you must make sure: DLDP is enabled on both ends, andthe interval of sending DLDP advertisement packets, authentication mode andpassword are consistent on both ends.z You can adjust the interval of sending DLDP advertisement packets (which is 5seconds by default and in the range of 1 seconds to 100 seconds) in differentnetwork circumstances, so that DLDP can respond rapidly to link failure. Theinterval must be shorter than one-third of the STP convergence time, which isgenerally 30 seconds. If too long an interval is set, an STP loop may occur beforeDLDP shut down unidirectional links. On the contrary, if too short an interval is set,network traffic increases, and port bandwidth is reduced.z DLDP is also applicable to STP Discarding ports. Ports discarded by STP can setup normal DLDP neighbors and detect unidirectional links.z DLDP does not process any LACP event, and treats each link in the aggregationgroup as independent.z The mandatory duplex mode must be enabled on both ends of the DLDP link. Inthis way, unidirectional links will be reported and the ports can be shut down asrequired; if the auto-negotiation duplex mode is configured on both ends, |
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