基本信息
文件名称：实施vlantrunks中型开关网络构建设计良好问题catalyst switch operations-0208操作.pptx
文件大小：1.45 MB
总页数：33 页
更新时间：2025-04-10
总字数：约8.03千字
文档摘要

ImplementingVLANsandTrunks

Medium-SizedSwitchedNetworkConstruction

IssuesinaPoorlyDesignedNetworkUnboundedfailuredomainsLargebroadcastdomainsLargeamountofunknown

MACunicasttrafficUnboundedmulticasttrafficManagementand

supportchallengesPossiblesecurity

vulnerabilities

VLANOverviewVLAN=BroadcastDomain=LogicalNetwork(Subnet)SegmentationFlexibilitySecurity

DesigningVLANsforanOrganizationVLANdesignmusttakeintoconsiderationtheimplementation

ofahierarchicalnetworkaddressingscheme.Thebenefitsofhierarchicaladdressingare:EaseofmanagementandtroubleshootingMinimizationoferrorsReducednumberofroutingtableentries

GuidelinesforApplyingIP

AddressSpaceAllocateoneIPsubnetperVLAN.AllocateIPaddressspacesincontiguousblocks.

NetworkTrafficTypesTraffictypestoconsider

whendesignatingVLANs:NetworkmanagementIPtelephonyIPMulticastNormaldataScavengerclass

AdvantagesofVoiceVLANsPhonessegmentedin

separatelogicalnetworksPrividesnetwork

segmentation

andcontrolAllowsadministrators

tocreateand

enforceQoSLetsadministrators

addandenforce

securitypolicies

VLANOperation

802.1QTrunking

802.1QFrame

UnderstandingNativeVLANs

ISLEncapsulationFramesencapsulatedwithISLheaderandCRCSupportformanyVLANs(1024)VLANfieldBPDUbit

VLANMembershipModes

VTPFeatures

Cannotcreate,

change,ordelete

VLANsSendsand

forwards

advertisementsSynchronizesCreateVLANsModifyVLANsDeleteVLANsSendsandforwards

advertisementsSynchronizesCreatelocalVLANsonlyModifylocalVLANsonlyDeletelocalVLANsonlyForwardsadvertisementsDoesnot

synchronizeVTPModes

VTPOperationVTPadvertisementsaresentasmulticastframes.VTPserversandclientsaresynchronizedtothe

latestrevisionnumber.VTPadvertisementsaresentevery5minutesor

whenthereisachange.

VTPPruning

ConfiguringVLANsandTrunksConfigureandverifyVTP.Configureandverify802.1Qtrunks.CreateormodifyaVLAN