4-3Specifying the APP to be Used at RebootAPP is the host software of the switch. If multiple APPs exist in the Flash memory, you can use thecommand here to specify the one that will be used when the switch reboots.Use the following command to specify the APP to be used at reboot:To do… Use the command… RemarksSpecify the APP to be used atrebootboot boot-loader [ backup-attribute ]{ file-url | device-name } RequiredUpgrading the Boot ROMYou can use the Boot ROM program saved in the Flash memory of the switch to upgrade the runningBoot ROM. With this command, a remote user can conveniently upgrade the Boot ROM by uploadingthe Boot ROM to the switch through FTP and running this command. The Boot ROM can be used whenthe switch restarts.Use the following command to upgrade the Boot ROM:To do… Use the command… RemarksUpgrade the Boot ROM boot bootrom { file-url |device-name } RequiredIdentifying and Diagnosing Pluggable TransceiversIntroduction to pluggable transceiversAt present, four types of pluggable transceivers are commonly used, and they can be divided intooptical transceivers and electrical transceivers based on transmission media as shown in Table 4-1.Table 4-1 Commonly used pluggable transceiversTransceiver type Applied environment Whether 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
