cisco查看模块是单模多模

show int status

Gi0/1    connected    trunk    a-full a-1000 1000BaseSX SFP

千兆的，SX是多模，10G的SR是多模；
LX ZX， LR,LH， ER ZR，等等全部是单模

Command for CatOS Version 8.x for Cat4000 and Cat6000 Switches:
Switch (enable)show sprom {mod/port} | include Vendor SN
Command for CatOS Version other than 8.x for Cat4000 and Cat6000 Switches:
Switch (enable)show sprom {mod/port}

Command for IOS for Cat6500 Switch:
Switch#show idprom interface gigabitEthernet {mod/port} | include Vendor SN
Command for Cat4500 Switch:
Switch#show idprom interface gigabitEthernet {module/port} | include Serial No.
Command for CAT3750/3560/2970/2960/2918 Switches:
Switch#show controllers ethernet-controller gigabitEthernet {mod/port} phy | include Serial Number

EXAMPLE OF A CAT4500 SWITCH:
Switch#show idprom interface gigabitEthernet 3/29 | include Serial No.
Vendor Serial No. = ICF1020202U <---- Serial No. is in the impacted range.