DEPLOYING A FULLY ROUTEDENTERPRISE CAMPUS NETWORK部署完全路由 企业校园网

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1、DEPLOYINGAFULLYROUTEDENTERPRISECAMPUSNETWORKSESSIONRST-2031RST-203111207_05_2005_c2©2005CiscoSystems,Inc.Allrightsreserved.1Agenda•CampusNetworkDesigns•RoutedAccessDesign•EIGRPDesignDetails•OSPFDesignDetails•PIMDesignDetails•SummaryRST-203111207_05_2005_c2©2005CiscoSystems,I

2、nc.Allrightsreserved.2HierarchicalCampusDesignBuildingBlocks•Offershierarchy—eachlayerhasAccessspecificrole•Modulartopology—buildingblocks•Easytogrow,understand,andSiSiSiSiSiSiDistributiontroubleshoot•Createssmallfaultdomains—cleardemarcationsandisolation•Promotesloadbalanci

3、ngandCoreredundancySiSi•Promotesdeterministictrafficpatterns•IncorporatesbalanceofbothLayer2andLayer3technology,leveragingtheDistributionstrengthofbothSiSiSiSiSiSi•Canbeappliedtoallcampusdesigns;multilayerL2/L3androutedaccessdesignsAccessWANDataCenterInternetRST-203111207_05

4、_2005_c2©2005CiscoSystems,Inc.Allrightsreserved.3TriedandTrue:ReferenceDesignMultilayerL2/L3DesignHSRPorGLBPLayer3HSRPorGLBPVLANs20,120,40,140VLANs20,120,40,140SiSiLayer2DistributionReferenceModelAccess10.1.20.0VLAN20Data10.1.40.0VLAN40Data10.1.120.0VLAN120Voice10.1.140.0VLA

5、N140Voice•ConsiderfullyutilizinguplinksviaGLBP•Distribution-to-distributionlinkrequiredforroutesummarization•NoSTPconvergencerequiredforuplinkfailure/recovery•MapL2VLANnumbertoL3subnetforeaseofuse/management•CaneasilyextendVLANsacrossaccesslayerswitchesifrequiredRST-20311120

6、7_05_2005_c2©2005CiscoSystems,Inc.Allrightsreserved.4HierarchicalCampusDesignMultilayerL2/L3BuildingBlocks•Networktrustboundary•UseRapidPVST+onL2portstopreventloopsinthetopologyAccess•UseUDLDtoprotectagainst1wayinterfaceUPconnections•Avoiddaisychainingaccessswitches•Avoidasy

7、mmetricroutingandunicastflooding,SiSiDistributiondon’tspanVLANSacrosstheaccesslayer•Aggregationandpolicyenforcement•UseHSRPorGLBPfordefaultgatewayprotectionCore•UseRapidPVST+ifyouMUSThaveL2loopsinyourtopologySiSi•Keepyourredundancysimple;deterministicbehavior=understandingfa

8、ilurescenariosandwhyeachlinkisneededDistributionSiSi•Highlyavailableandfast