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1、Cisco发现协议CiscoDiscoveryProtocol深圳职业技术学院电子与通信工程学院教学目标（Objectives）1.Cisco发现协议特征（FeatureofCiscoDiscoveryProtocol）2.CDP查看命令（CDPViewCommands）3.开启和关闭CDP（EnableanddisableCDP）4.配置计时器（Configuretimers）Cisco发现协议（CiscoDiscoveryProtocol）1.Cisco提供的专有的命令CDPrunsonallCiscoequipmen
2、t2.获得直接连接的设备的信息摘要DiscoverallCiscodevicesthataredirectlyconnectedtoalocaldevice.3.运行在数据链路层CiscoDiscoveryProtocol(CDP)isaLayer2protocol4.CDP默认自动启动CDPisenabledbydefault.5.CDP默认更新周期60秒CDPupdatetimeris60sbydefault.6.CDP默认过期周期180秒CDPholdtimeris180sbydefault.信息摘要包括：Summa
3、ryinformationincludes: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)）CDPshowcdpCDPCDP用CDP发现邻居 （DiscoveringNeighborswith
4、CDP）使用showcdpneighbor命令UsingtheshowcdpneighborCommandRouterA#showcdpneighborsCapabilityCodes:R-Router,T-TransBridge,B-SourceRouteBridgeS-Switch,H-Host,I-IGMP,r-RepeaterDeviceIDLocalIntrfceHoldtmeCapabilityPlatformPortIDRouterBSer0148R2522Ser1SwitchAEth0167TS19002S
5、witchBRouterARouterBSwitchA10.3.3.210.3.3.110.1.1.110.1.1.210.2.2.110.2.2.2S0S1使用showcdpentry命令UsingtheshowcdpentryCommandRouterA#shcdpentry*-------------------------DeviceID:RouterBEntryaddress(es):IPaddress:10.1.1.2Platform:cisco2522,Capabilities:RouterInterface
6、:Serial0,PortID(outgoingport):Serial1Holdtime:168secVersion:CiscoInternetworkOperatingSystemSoftwareIOS(tm)2500Software(C2500-JS-L),Version12.0(3),RELEASESOFTWARE(fci)Copyright(c)1986-1999byciscoSystems,Inc.CompiledMon08-Feb-9918:18byphanguyeSwitchBRouterARouterBS
7、witchA10.3.3.210.3.3.110.1.1.110.1.1.210.2.2.110.2.2.2S0S1CDP其它命令（AdditionalCDPCommands）RouterA#shcdptrafficCDPcounters:Packetsoutput:56,Input:38Hdrsyntax:0,Chksumerror:0,Encapsfailed:3Nomemory:0,Invalidpacket:0,Fragmented:0RouterA#shcdpinterfaceBRI0isadministrati
8、velydown,lineprotocolisdownEncapsulationHDLCSendingCDPpacketsevery60secondsHoldtimeis180secondsSwitchBRouterARouterBSwitchA10.3.3.210.3.3.110.1.1.110.1.
