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1、以太网交换机常用的光模块有SFP，GBIC，XFP，XENPAK。它们的英文全称，中文名不常用，可以简单了解下:SFP:SmallForm-factorPluggabletransceiver，小封装可插拔收发器GBIC：GigaBitInterfaceConverter，千兆以太网接口转换器XFP:10-Gigabit smallForm-factorPluggabletransceiver 万兆以太网接口小封装可插拔收发器XENPAK: 10GigabitEtherNetTransceiverPAcKage万兆以太网接口收发器
2、集合封装通过diplayinterface命令可以在软件中显示光模块的端口类型信息，显示格式为:disinterfaceGigabitEthernet3/1/1GigabitEthernet3/1/1currentstate:UPIPSendingFrames'FormatisPKTFMT_ETHNT_2,Hardwareaddressis000f-e231-76fcTheMaximumTransmitUnitis1500Mediatypeisopticalfiber,loopbacknotsetPorthardwar
3、etypeis1000_BASE_SX_MMF1000Mbps-speedmode,full-duplexmodeLinkspeedtypeisautonegotiation,linkduplextypeisautonegotiationFlow-controlisnotenabledTheMaximumFrameLengthis1552BroadcastMAX-ratio:50%AllowjumboframetopassPVID:2Link-statusholdinterval:3SecPortlink-type:accessTagg
4、ed VLANID:noneUntaggedVLANID:2Last300secondsinput:26839packets/secbits/sec 13%Last300secondsoutput:29370packets/secbits/sec 13%Input(total):packets,01bytes -broadcasts,-multicastsInput(normal):packets,01bytes 0broadcasts,multicastsInput:0inputerrors,
5、0runts,0giants,0throttles,0CRC 0frame,0overruns,-aborts,0ignored,-parityerrorsOutput(total):packets,34bytes -broadcasts,-multicasts,0pausesOutput(normal):packets,34bytes 259broadcasts,multicasts,0pausesOutput:0outputerrors,-underruns,-bufferfailures
6、 0aborts,0deferred,-collisions,0latecollisions -lostcarrier,-nocarrierReceivePacketPeakValueInfo:bits/sec,happenedat15:05:3410-31-2007TransmitPacketPeakValueInfo:bits/sec,happenedat13:05:5210-31-20071000_BASE_SX_MMF各字段含义如下：1000光模块支持的最高速率SX ：传输距离。（SX短距。LX中距
7、LH+传输距离长距）
