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1、ConfiguringaCatalystSwitchPortSecurityDuplexOverviewHalfDuplex(CSMA/CD)UnidirectionaldataflowHigherpotentialforcollisionHubsconnectivityFullDuplexPoint-to-pointonlyAttachedtodedicatedswitchedportRequiresfull-duplexsupportonbothendsCollision-freeCollisiondetectcircuitdisab
2、ledSettingDuplexOptionsCatalyst2950wg_sw_2950(config)#interfacefe0/1wg_sw_2950(config-if)#duplex{auto
3、full
4、half}ShowingDuplexOptionsSwitch#showinterfacesfastethernet0/3FastEthernet0/3isup,lineprotocolisdownHardwareisFastEthernet,addressis0000.0000.0003(bia0000.0000.0003)M
5、TU1500bytes,BW100000Kbit,DLY100usec,reliability255/255,txload1/255,rxload1/255EncapsulationARPA,loopbacknotsetKeepaliveset(10sec)Half-duplex,10Mb/sinputflow-controlisoff,outputflow-controlisoffARPtype:ARPA,ARPTimeout04:00:00Lastinputnever,outputnever,outputhangneverLastcl
6、earingof"showinterface"countersneverQueueingstrategy:fifoOutputqueue0/40,0drops;inputqueue0/75,0drops5minuteinputrate0bits/sec,0packets/sec5minuteoutputrate0bits/sec,0packets/sec0packetsinput,0bytes,0nobufferReceived0broadcasts,0runts,0giants,0throttles0inputerrors,0CRC,0
7、frame,0overrun,0ignored0inputpacketswithdribbleconditiondetected0packetsoutput,0bytes,0underruns0outputerrors,0collisions,2interfaceresets0babbles,0latecollision,0deferred0lostcarrier,0nocarrier0outputbufferfailures,0outputbuffersswappedoutManagingtheMACAddressTableCataly
8、st2950wg_sw_2950#showmac-address-tableDynamicAddressCount:1SecureAddressCount:0StaticAddress(User-defined)Count:0SystemSelfAddressCount:25TotalMACaddresses:26MaximumMACaddresses:8192Non-staticAddressTable:DestinationAddressAddressTypeVLANDestinationPort-------------------
9、------------------------------------0050.0f02.3372Dynamic1FastEthernet0/2SettingaPermanentMACAddresswg_sw_2950(config)#mac-address-tablestatic mac_addr{vlanvlan_id}[interfaceint1[int2...int15]]Catalyst2950onlySettingaRestrictedStaticMACAddressontheCatalyst2950wg_sw_2950#m
10、ac-address-tablesecure0003.3333.3333fa0/1vlan1wg_sw_2950#showmac-address-tableDynamicAddressCoun
