課件02實(shí)施以太網(wǎng)lan乾頤堂ccnav

實(shí)施以太網(wǎng)（乾頤堂首發(fā)CCNA200-301v1.0）UsingtheCommand-LineInterfaceyzingEthernetLANSwitchingConfiguringBasicSwitchManagementConfiguringandVerifyingSwitchInterfaces（乾頤堂首發(fā)CCNA200-301v1.0）思科交換機(jī)的物理連接器叫做interface或者port（接口/端口）思科將這一系列交換機(jī)上的操作系統(tǒng)稱為：InternetworkOperatingSystem(除了控制交換機(jī)的性能和行為外，CiscoIOS還為人類定義了一個(gè)界面，稱為CLI針對(duì)網(wǎng)絡(luò)設(shè)備的三種主 方法vsCablingtheConsole使用USBCOM1//COM端口編號(hào)8bit1bit停止位無AccessingtheCLI netand通 UserEnableUserandEnable(Privileged)>#代表處 模模式【enable】可以執(zhí)行一些功能強(qiáng) 令，比如重啟設(shè)PasswordSecurityforCLIAccessfromthe CLIError%AmbiguousNotenoughcharacterswere?????SwitchX#clock%pleteSwitchX#clockset%plete wereleftofftheendoftheSwitchX#>SwitchX#>clockset19:50:0025^%Invalidinputdetectedat"^"Thecaret(^)indicateswherethecommandinterpretercannotdeciphertheCLIHelpCtrl+w

SW1#showrunning-configBuildingconfiguration...Currentconfiguration:819!!Lastconfigurationchangeat12:13:47EETFriDec13!versionservicetimestampsdebugdatetimemsecservicetimestampslogdatetimemsecnoservicepassword-encryptionservicecompress-config!hostname!

乾頤堂首 A（200-301）Routing&Switching實(shí)戰(zhàn)

SW1#configureterminalEnterconfigurationcommands,oneperline.EndwithCNTL/Z.SW1(config)#interfaceethernet0/0StoringSwitchConfigurationRAM——Flash——用 系統(tǒng)鏡像或者其它文件，類似于電腦的硬ROM——只 器 交換機(jī)的引導(dǎo)程序，開機(jī)時(shí)引導(dǎo)交換機(jī)找到系統(tǒng)鏡像文NVRAM——非易失 器，用 啟動(dòng)配置文SW1#copyrunning-configstartup-configDestinationfilename[startup-config]?SW1#copyrunning-configstartup-configDestinationfilename[startup-config]?BuildingCompressedconfigurationfrom819bytesto551bytes[OK]ThreemethodstoaccessaswitchCablingoptionsforaconsoleACiscoswitch’sdefaultconsoleportNavigationbetweenuser,enable,andglobalconfigAlistofconfigurationmodeprompts,thenameoftheconfigurationmode,andthecommandusedtoreacheachmodeThenamesandpurposesofthetwoconfigurationfilesinaswitchoryzingEthernetLAN（乾頤堂首發(fā)CCNA200-301v1.0）1、NetworkRoleandfunctionofnetworkL2andL3DescribeswitchingMAClearningandFrame

FrameMACaddress2、NetworkDescribetheneedforandbasicoperationsofRapidPVST+SpanningTreeProtocolandidentifybasic 乾頤堂首 A（200-301）Routing&Switching實(shí)戰(zhàn)1、根據(jù)目標(biāo)MAC地址決定轉(zhuǎn)發(fā)2、學(xué)習(xí)數(shù)據(jù)幀中的源MAC3、通過生成樹協(xié)議與其它交換機(jī)創(chuàng)建無環(huán)環(huán)境，Aswitch’sMACaddresstableisalsocalledtheswitchingtable,orbridgingtable,oreventheContent-AddressableMemory(CAM)table,inreferencetothetypeofphysicalmemoryusedtostorethe那么，圖中列出的MAC地址記錄listMAC+址來構(gòu)建地址表。如果幀進(jìn)入交換機(jī)，并且源MAC地址不MAC+重點(diǎn)關(guān)注學(xué)習(xí)過程以及MAC交換機(jī)將目的使用稱為交換機(jī)將目的使用稱為泛洪的過程對(duì)其進(jìn)行轉(zhuǎn)發(fā)。當(dāng)將幀轉(zhuǎn)發(fā)出所有接口（入接口除外）LAN交換機(jī)的第三個(gè)主要功能是防止環(huán)路，這是由生成樹協(xié)議（STP）如果沒有STP為了防止出現(xiàn)循環(huán)幀，STP 某些端口轉(zhuǎn)發(fā)幀，以便在任何一對(duì)LAN網(wǎng)段之間僅存在一條活動(dòng)路徑Larryto對(duì)于透明網(wǎng)橋和交換機(jī)，STP的行為相同。因此，在討SwitchesforwardframesbasedonthedestinationMACSwitcheslearnMACSwitchesuseSTPtopreventloopsbycausingsomeinterfacestoblock,meaningthattheydonotsendorreceiveframes.HandsOn乾頤堂首 所有接口都分配給VLAN1Usetheerasestartup-configEXECcommandtoerasethestartup-configUsethedeletevlan.datEXECcommandtodeletetheVLANconfigurationUsethereloadEXECcommandtoreloadtheswitch(therebyusingtheemptystartup-config,withnoVLANinformationconfigured)ConfigurethehostnameSW1commandtosettheswitchclearmacaddress-table

思考SW1和SW2之間的接口上的MACThreemainfunctionsofaLANProcesstoforwardaknownunicastProcesstoforwardaknownunicast,secondProcesstolearnMACSummaryofswitchforwardingTheshowmacaddress-tabledynamicknownunicastSpanningTreeProtocolunknownunicastMACaddress 1.0Network1.6ConfigureandverifyIPv4addressingand4.0IP4.6Configureandverify and4.8Configurenetworkdevicesforremoteaccessusing5.0Security5.3ConfiguredeviceaccesscontrolusinglocalSecuringusermodeandprivilegedmodewithsimpleSecuringusermodeaccesswithlocalSecuringusermodeaccesswithexternalauthenticationSecuringremoteaccesswithSecure SW1#configureSW1#configureEnterconfigurationcommands,oneperline.EndwithCNTL/Z.SW1(config)#enablesecretloveSW1(config)#lineconsole0%Logindisabledonline0,until'password'issetSW1(config-line)#passwordfaithSW1(config)#linevty04SW1(config-line)#passwordhopeshowrunning-showip

SW1#configureEnterconfigurationcommands,oneperline.EndwithCNTL/Z.SW1(config)#hostnameSW1SW1(config)#ip -nameSW1(config)#cryptokeygeneratersaThenameforthekeyswillbe:Choosethesizeofthekeymodulusintherangeof360to2048foryourGeneralPurposeKeys.Choosingakeymodulusgreaterthan512maytakeafewHowmanybitsinthemodulus[512]:%Generating1024bitRSAkeys,keyswillbenon-exportable...[OK](elapsedtimewas4seconds)SW1(config)#ipsshversion2SW1(config)#linevty015SW1(config-line)#loginlocalSW1(config-line)#transportinputsshSW1(config-line)#exitSW1(config)#usernamewendellpasswordodomSW1(config)#usernamechrispasswordyoudamanSW1(config)#^ZHostandSwitchIPConfiguringIPv4onaVerifyingIPv4onalogg