ImplementingAdvancedCiscoIOSFeaturesSPOTO DynamicHostConfigurationConfiguringaDHCPRouter(config)#ipRouter(config)#ipdhcppool[poolEnablesaDHCPpoolforusebySpecifiesthenetworkandsubnetmaskoftheSpecifiesthedefaultrouterforthepooltoRouter(config-ipipaddressEnablesaCiscoIOSdevicetoobtainanIPaddressfromaDHCPHelperAddressingRoutersdonotforwardbroadcasts,byHelperaddressprovidesselectiveWhyUseaHelper sdonotknowtheserverHelperschangebroadcasttounicasttoreachIPHelperAddressiphelper-addressiphelper-addressEnablesforwardingandspecifiesdestinationaddressforUDPbroadcastChangesdestinationaddressfrombroadcasttounicastdirectedbroadcastipipforward-protocol{udp[port]SpecifieswhichprotocolswillbeOption 電路ID默認是指接收到DHCP請求報的接入交換機Vlan名加接入二層端口名稱，如ID（即Remote ID是指接收到DHCP請求報文接入交換機的vlanMAC地址子選項2通常與子選項1共同使用來標識DHCP客戶端的信息DHCPVerificationshowshowipdhcp ysrecentactivityontheDHCPshowshowipdhcpserverShowscountinformationaboutstatisticsandmessagesandshowshowiproute ysroutesaddedtotheroutingtablebydebugdebugipdhcpserver{events|packets|EnablesdebuggingontheDHCP息這消能輸到控制臺,Y或 如果發送到syslog服務器,消息被發送在UDP端口你可能熟悉syslog消息%SYS-5-CONFIG_I:Configuredfromconsoleby%SYS-5-CONFIG_I:Configuredfromconsolebyconsole;SEVERITY:設備上 0Emergency緊急、1Alert：警報、2 、3Error:4Warning5notifications：通知、6Informational7DebuggingMNEMONIC:AcodethatidentifiestheactionP et成功，幫助員工成功，幫助合作伙伴成功IPIPSLAisafeaturethatenablesaCiscorouterorswitchtosimulatespecifictypesoftrafficandsendittoareceiver,calledaresponder. IPSLAprobescansimulatevarioustypesoftraffic,suchasHTTP,FTP,DHCP,UDPjitter,UDPecho,HTTP,TCPconnect,ICMPecho,ICMPpathecho,ICMPpathjitter,andDNS,andcanreportstatisticssuchaspath2）被管理的設備（managed 者網絡管理系統 MIB：ManagementInformationBase：管理信息庫可以通 認證控 read-only(RO)orread-SNMP版本：V1V2 Thefollowingconfigurationcreatesastandardaccesslistthatallowsonlytrafficsourcedfromthehostat.CreatedCommunity-String“c1sc0”forread-writeaccess.Read-writeaccessispermittedonlyfromthehostspecifiedinaccesslist1.Next,theSNMPserveraddressisgiven,alongwiththetosendtrapsmessagestothatserver.sw1(config)