1-6For the purpose of the stability of an interface index, the system will save the 16-bit interface index whena logical interface is removed.If you repeatedly to create or delete a large number of logical interfaces, the interface indexes will beused up, which will result in interface creation failures. To avoid such a case, you can clear all 16-bitinterface indexes saved but not used in the current system in user view.After the above operation,z For a re-created interface, the new interface index may not be consistent with the original one.z For existing interfaces, their interface indexes remain unchanged.Follow these steps to clear the 16-bit interface indexes not used in the current system:To do… Use the command… RemarksClear the 16-bit interfaceindexes saved but not used inthe current systemreset unused porttag RequiredAvailable in user view.A confirmation is required when you execute this command. If you fail to make a confirmation within 30seconds or enter N to cancel the operation, the command will not be executed.Identifying and Diagnosing Pluggable TransceiversIntroduction to pluggable transceiversAt present, four types of pluggable transceivers are commonly used, as shown in Table 1-1. They canbe further divided into optical transceivers and electrical transceivers based on transmission medium.Table 1-1 Commonly used pluggable transceiversTransceiver type ApplicationenvironmentWhether can be anoptical transceiverWhether can be anelectrical transceiverSFP (SmallForm-factorPluggable)Generally used for100M/1000M Ethernetinterfaces or POS155M/622M/2.5GinterfacesYes YesGBIC (GigabitInterface Converter)Generally used for1000M EthernetinterfacesYes YesXFP (10-Gigabit smallForm-factorPluggable)Generally used for10G EthernetinterfacesYes NoXENPAK (10-GigabitEthernet TransceiverPackage)Generally used for10G EthernetinterfacesYes Yes
