网络架构和网络规划ppt课件.ppt

《网络架构和网络规划ppt课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、网络架构和网络规划园区网络基本架构园区网络传统的基本架构CollisionDomain1CollisionDomain2BroadcastDomainBridgesterminatecollisiondomainsPerformanceIssuesMulticast,broadcast,andunknowndestinationeventsbecomeglobaleventsServerAARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPAR

2、PARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPARPIneedtoknowtheMACaddressforServerAARPARPARPARPARPARPARPARP3BroadcastIssuesBroadcastscanconsumeallavailablebandwidthEachdevicemustdecodethebroadcastframeServerA4Solution:LocalizingTraffic10.1.1.010.1.2.010.1.3.0LANbroadcas

3、tsterminateattherouterinterface5Solution:LocalizingTraffic(Cont.)VLAN3VLAN2VLAN1VLANscontainbroadcasttrafficandseparatetrafficflows6VLAN7VLAN6VLAN5CurrentCampusNetworksVLAN3VLAN2VLAN1VLAN10VLAN9VLAN8Layer3devicesinterconnectLANsegmentswhilestillcontainingbroadcastdomain

4、s7TheNew20/80Rule20percentofthetrafficislocal;80percentisremoteVLAN3VLAN2VLAN120%LocalTraffic20%LocalTraffic20%LocalTraffic80+%RemoteTraffic8EmergingCampusStructureRemoteServicesEnterpriseServicesLocalServicesTrafficpatternsdictatetheplacementofservices80%Non-LocalTra

5、ffic9LocalServicesDevicesconnectedbyswitchesTrafficwithinthesamesubnet/VLANTrafficdoesnotcrossthebackbone10RemoteServicesDevicesconnectedbyroutersTrafficcrossessubnet/VLANSegregatedbyLayer3Trafficmay/maynotcrossthebackbone11EnterpriseServicesCommontoallusersTrafficcross

6、essubnet/VLANTrafficcrossesthebackboneSegregatedbyLayer3MaybegroupedbyLayer212Layer2SwitchingDataLinkHardware-basedbridgingWire-speedperformanceHigh-speedscalabilityLowlatencyMACaddressLowcost765432113ImpactofLayer2SwitchingLayer2switchednetworkshavethesamecharacteristi

7、csasbridgednetworks14BenefitsofRoutingBroadcastcontrolMulticastcontrolOptimalpathdeterminationTrafficmanagementLogicaladdressingLayer3securityE010.1.1.1E110.2.2.2E0E110.1.1.110.2.2.2157654321Layer3SwitchingNetworkLayerHardware-basedpacketforwardingHigh-performancepacke

8、tswitchingHigh-speedscalabilityLowlatencyLowerper-portcostFlowaccountingSecurityQoS16MultilayerSwitchingTrans