计算机网络管理应用技术ppt课件.ppt

计算机网络管理应用技术 ComputerNetworkManagementApplicationTechnology CourseContents InstallingSNMPAgentAsimpleSNMPdemo MibbrowserBasicNetworkknowledgeSocketProgrammingSNMP BasicEncodingRulesImplementationofSNMP lowlevelsocketImplementationofSNMP usingJavaAPIsCiscoWorks2000application InstallingSNMPAgent InstallingSNMPAgent windowXPplatform InstallingSNMPAgent SNMPManager SNMPAgent InstallingSNMPAgent InstallingSNMPAgent InstallingSNMPAgent Selecttheunderlineditemandclick next InstallingSNMPAgent InstallingSNMPAgent InstallingSNMPAgent InstallingSNMPAgent MIBfiles c windows system32 MibbrowserDemo MibbrowserDemo MibbrowserDownload DownloadWebsite 2componentsincluded SnmpDisignStudio 30daystrial MibbrowserJREisneededJDK1 5released MibbrowserDemo Load UnloadModulesExploreMIBelementsGet requestGet nextSet requestGet bulkShowinTableShowinLine Anexampleofreceivingpackets QQingWebpagesDownloadingSNMPpackets BasicNetworkKnowledge BasicNetworkKnowledge Preparation BasicNetworkKnowledge TCP IPvs ISO OSIIEEE802 3vs EthernetIIIPpacketformatTCPvs UDP TCP IPlayers Applications IEEE802 3 EthernetII IPPacketFormat TCPvs UDP TCP TransportControlProtocol Aconnection orientedprotocolProvidesareliableflowofdatabetweentwocomputersExampleapplications HTTPFTPTelnet TCPvs UDP UDP UserDatagramProtocol Aprotocolthatsendsindependentpacketsofdata calleddatagrams fromonecomputertoanotherWithoutguaranteesaboutarrivalExampleApplications ClockServerSNMPRTP SocketProgramming SocketProgramming SocketProgramming Socket Socketsprovideaninterfaceforprogrammingnetworksatthetransportlayer Socket IPAddress PortNetworkcommunicationusingSocketsisverymuchsimilartoperformingfileI OSocket basedcommunicationisprogramminglanguageindependent SocketProgramming Port TheTCPandUDPprotocolsuseportstomapincomingdatatoaparticularprocessrunningonacomputer SocketProgramming Port Portisrepresentedbyapositive 16 bit integervalueSomeportshavebeenreservedtosupportcommon wellknownservices ftp21 tcptelnet23 tcpsmtp25 tcppop3110 tcpUserlevelprocess servicesgenerallyuseportnumbervalue 1024 SocketTypes StreamingSocketDatagramSocketRawSocket SocketProgramming TCPSocket ClientSocket ServerSocket NewSocket SocketProgramming UDPSocket DatagramSocket DatagramPacket InetAddress Address Port SocketProgramming AnExampleforJavaUDPSocket Senderbyte buffSend newbyte 1024 StringstrHello Hellobaby buffSend strHello getBytes InetSocketAddressaddr newInetSocketAddress 10 10 10 22 1978 DatagramPacketpack newDatagramPacket buffSend 0 buffSend length addr DatagramSocketsockSend newDatagramSocket sockSend send pack SocketProgramming AnExampleforJavaUDPSocket ReceiverDatagramSocketsockRcv newDatagramSocket 1978 byte buffRcv newbyte 1024 DatagramPacketpack newDatagramPacket buffRcv buffRcv length sockRcv receive pack blockingprocessbuffRcvproperly SNMP BasicEncodingRules SNMP BasicEncodingRules SNMPPDU SNMPPDU0 Get 1 Get next 2 Get response 3 Set request 4 Trap SNMPPDUinRFC1157 Message SEQUENCE versionINTEGER version 1 0 communityOCTETSTRING dataANY PDU CHOICE get requestGetRequest PDU get next requestGetNextRequest PDU get responseGetResponse PDU set requestSetRequest PDU trapTrap PDU SNMPPDUinRFC1157 GetRequest PDU 0 IMPLICITPDUGetNextRequest PDU 1 IMPLICITPDUGetResponse PDU 2 IMPLICITPDUSetRequest PDU 3 IMPLICITPDUPDU SEQUENCE request idINTEGER error statusINTEGER noError 0 tooBig 1 noSuchName 2 badValue 3 readOnly 4 genError 5 error indexINTEGER variable bindingVarBinList SNMPPDUinRFC1157 VarBinList SEQUENCEOFVarBinVarBin SEQUENCE nameObjectName valueObjectSyntax SNMPPDUstructure BasicEncodingRules BER type length valuecommontypecodes 30 SEQUENCE02 INTEGER05 NULL04 STRING06 OBJECTIDENTIFIER ImplementationofSNMP LowLevelSocket ImplementationofSNMP LowLevelSocket Datagramcontent Exampleparameter operate get request 0 xA0 get next 0 xA1 set request 0 xA2 community bearread mib system sysContact 1 3 6 1 2 1 1 4 system sysName 1 3 6 1 2 1 1 5 system sysLocation 1 3 6 1 2 1 1 6 DatagramContent 1 0 bearread get 0 xA0 0 0 1 3 6 1 2 1 1 4 SNMPpacketcontent 3028 sequencelength 0 x28020100 version 1 0 x00 04086265617272656164 community bearread A0 Get1902011B ID020100 差错状态020100 差错索引300E300C06082B060102010104000500 SNMPsocketDemoinJava SNMPResponsepacket 3046210486265617272656164a237211b210210302c302a682b612114041e426561722028787173636f7270696f6e407961686f6f2e636f6d2e636e29 EthernetIIPrintScreen QQing IEEE802 3PrintScreen Unknown GetrequestpacketPrintScreen GetrequestpacketPrintScreen EthernetII IPHeader UDPHeader GetrequestpacketPrintScreen Sequenceof Version Community Get ID ErrorStatus ErrorIndex Sequenceof 1 3 6 1 2 1 1 5 0 null GetresponsepacketPrintScreen GetresponsepacketPrintScreen EthernetII IPHeader UDPHeader GetresponsepacketPrintScreen sequenceof version community response ID ErrorStatus ErrorIndex sequenceof 1 3 6 1 2 1 1 5 0 cisco2950 ImplementationofSnmp UsingJavaAPIs ImplementationofSNMP UsingJavaAPIs MibSample SNMPSample MibSample Employedclasses MibOperations providesthemethodsnecessarytoloadandunloadMIBmodulesinthemanagementapplicationsandapplets MibModule representsaMIBmodule andenablesoperationsonMIBmodulesloadedfromMIBfiles MibNode representsaMIBnodeintheMIBmoduletree Usingthemethodsavailableinthisclass wecangettheNodeinformationofdifferentMacroTypes KeyMethods Objective ListallMIBnodesinfile mib ii mib KeyMethods mibModule mibOp loadMibModule c mib ii mib mibNode mibModule getRootNode Vectorv node getChildList node toString node getNumberedOIDString RecursivelyExploringtheNodes printNodes MibNodenode showcurrentnode sinformation getallthechildrenofcurrentnode foreachchildnodedoprintNodes childNode SNMPSample EmployedClasses SnmpApi athreadwhichmonitorsSNMPsessionsandcontainsvariousSNMPparameters SnmpSession getsasocketforSNMPcommunication SnmpPDU setsvariousparameters suchasremotehost remoteport version community retries timeouts etc SNMPSample EmployedClasses SnmpApi athreadwhichmonitorsSNMPsessionsandcontainsvariousSNMPparameters SnmpSession getsasocketforSNMPcommunication SnmpPDU setsvariousparameters suchasremotehost remoteport version community retries timeouts etc CiscoWorks2000application CiscoWorksforWindows是一个全面的基于web的网络管理解决方案 它主要应用于中小型的企业网 它提供了一套强大的监控和配置工具 用于管理基于Cisco的交换机 路由器 集线器等设备 CiscoWorks2000application 一 CiscoWorks2000系统的登录1 从服务器上登录2 从远程客户端登录 CiscoWorks2000application CiscoWorks2000application 二 用户账号的管理CiscoWorksforWindows提供以下3种类型的用户账号 guest 以只读方式访问 operator 允许配置设备 admin 超级用户 CiscoWorks2000application 1 用CiscoWorksforwindowsdesktop进行账号管理在客户机上远程登录到安装了CiscoWorksforWindows服务器上 使用CiscoWorksforwindowsdesktop可进行账号管理 点击 Tasks 文件夹下的 UserAdministration 系统会出现用户账号管理界面 见下一幻灯片 然后 按照提示操作步骤可增加一个用户账号和分配相应的权限 CiscoWorks2000application CiscoWorks2000application CiscoWorks2000application 2 用WhatsUpGold进行账号管理在服务器端 则用WhatsUpGold进行账号管理 首先在任务栏上单击 开始 按钮 选择 程序 菜单 让光标指向CiscoWorksforWindows6 1 单击WebServer 就可启动CWW的WebServer 然后在CiscoWorksforWindows主界面中点击WhatsUpGlod选项 则出现WhatsUpGlod用户操作界面 见下一页 点击 WebServer 进入帐号管理操作界面 接下来 按照提示操作即可增加一个用户账号和相应的权限 其中zhy是增加的一个账号 CiscoWorks2000application CiscoWorks2000application CiscoWorks2000application 三 WhatsUpGold的使用WhatsUpGold是一种基于简单网络管理协议 SNMP 的图形化网络管理工具 可以通过网络拓扑结构图同时监视多个设备 具有网络搜索 映射 监测和警报追踪的功能 用户界面 CiscoWorks2000application CiscoWorks2000application 选择NewMapWizard命令后 它会自动搜索所要显示的网段的