第四章-CDP协议PPT课件.ppt

Cisco发现协议CiscoDiscoveryProtocol 教学目标 Objectives 1 Cisco发现协议特征 FeatureofCiscoDiscoveryProtocol 2 CDP命令 CDPCommand 3 开启和关闭CDP EnableanddisableCDP 4 远程登录 telnet Cisco发现协议 CiscoDiscoveryProtocol 1 Cisco提供的专有的命令CDPrunsonallCiscoequipment2 获得直接连接的设备的信息摘要TheprimaryuseofCDPistodiscoverallCiscodevicesthataredirectlyconnectedtoalocaldevice 3 运行在数据链路层CiscoDiscoveryProtocol CDP isaLayer2protocol4 Cdp版本1在10 3版本后会自动启动CDPVersion1isenabledbydefaultwithCiscoIOS Release10 3later 5 cdp更新周期60秒CDPupdatetimeris60s6 cdp过期周期180秒CDPholdtimeris180s 信息摘要包括 Summaryinformationincludes 设备ID DeviceID 本地接口 LocalInterface 保持时间 Holdtime 功能 Capability 平台 Platform 端口ID PortID VTP域名 VTPManagementDomainName CDPv2only 本征VLAN NativeVLAN CDPv2only 全双工 半双工 Full Half Duplex CDPv2only CDP CDP CDP 用CDP发现邻居 DiscoveringNeighborswithCDP UsingtheshowcdpneighborCommand RouterA shcdpneighborsCapabilityCodes R Router T TransBridge B SourceRouteBridgeS Switch H Host I IGMP r RepeaterDeviceIDLocalIntrfceHoldtmeCapabilityPlatformPortIDRouterBSer0148R2522Ser1SwitchAEth0167TS19002 SwitchB RouterA RouterB SwitchA 10 3 3 2 10 3 3 1 10 1 1 1 10 1 1 2 10 2 2 1 10 2 2 2 S0 S1 UsingtheshowcdpentryCommand RouterA shcdpentry DeviceID RouterBEntryaddress es IPaddress 10 1 1 2Platform cisco2522 Capabilities RouterInterface Serial0 PortID outgoingport Serial1Holdtime 168secVersion CiscoInternetworkOperatingSystemSoftwareIOS tm 2500Software C2500 JS L Version12 0 3 RELEASESOFTWARE fci Copyright c 1986 1999byciscoSystems Inc CompiledMon08 Feb 9918 18byphanguye SwitchB RouterA RouterB SwitchA 10 3 3 2 10 3 3 1 10 1 1 1 10 1 1 2 10 2 2 1 10 2 2 2 S0 S1 CDP其它命令 AdditionalCDPCommands RouterA shcdptrafficCDPcounters Packetsoutput 56 Input 38Hdrsyntax 0 Chksumerror 0 Encapsfailed 3Nomemory 0 Invalidpacket 0 Fragmented 0RouterA shcdpinterfaceBRI0isadministrativelydown lineprotocolisdownEncapsulationHDLCSendingCDPpacketsevery60secondsHoldtimeis180seconds SwitchB RouterA RouterB SwitchA 10 3 3 2 10 3 3 1 10 1 1 1 10 1 1 2 10 2 2 1 10 2 2 2 S0 S1 1 在全局配置模式下使用 no cdprun命令开启或关闭所由接口的CDP功能 默认情况下 CDP被全局开启 ThecdpruncommandisusedtoenableCDPgloballyontherouter Bydefault CDPisgloballyenabled 2 在接口模式下使用 no cdpenable命令可以开启或关闭某个特定接口的CDP功能 CDPcouldbeenabledoneachofthedevicesinterfacesbyusingthecdpenablecommand 开启和关闭CDP EnableanddisableCDP 配置周期 ConfiguringTimer Router config cdptimer5Router config cdpholdtime15 用telnet连接到远程主机 UsingTelnettoConnecttoRemoteDevices Remotedevice SwitchB RouterA RouterB SwitchA 10 3 3 2 10 3 3 1 10 1 1 1 10 1 1 2 10 2 2 1 10 2 2 2 S0 S1 RouterA telnet10 1 1 2Trying10 1 1 2 Open Catalyst1900ManagementConsoleCopyright c CiscoSystems Inc 1993 1998Allrightsreserved EnterpriseEditionSoftwareEthernetAddress 00 90 86 73 33 40PCANumber 73 2239 06PCASerialNumber FAA02359H8KModelNumber WS C1924 ENSystemSerialNumber FAA0237X0FQ RouterB 查看telnet连接 ViewingTelnetConnections SwitchB RouterA RouterB SwitchA 10 3 3 2 10 3 3 1 10 1 1 1 10 1 1 2 10 2 2 1 10 2 2 2 S0 S1 RouterA shsessionConnHostAddressByteIdleConnName110 1 1 210 1 1 20110 1 1 2 210 3 3 210 3 3 20010 3 3 2RouterA shuserLineUserHost s IdleLocation 0con010 1 1 2310 3 3 2211vty0idle110 1 1 2 挂起telnet会话 SuspendingaTelnetSession SwitchB RouterA RouterB SwitchA 10 3 3 2 10 3 3 1 10 1 1 1 10 1 1 2 10 2 2 1 10 2 2 2 S0 S1 RouterB xRouterA shsessionConnHostAddressByteIdleConnName110 1 1 210 1 1 20110 1 1 2RouterA resume1RouterB RouterA disconnectClosingconnectionto10 3 3 2 confirm RouterA clearline11 confirm OK 关闭telnet会话 ClosingaTelnetSession Closingasessionopenedbyaremotedevice Closingthecurrentsessionopenedbyyou SwitchB RouterA Rout