新版CCNA200-120PPT文档9-VLAN Trunk

CCNA(640-802),CCNA200-120,CCIE：41722QQ：2952545837,多个交换机上的VLAN应用,FastEthernet,工程VLAN市场VLAN会计VLAN,1楼,2楼,3楼,交换机之间的VLAN通信31,VLAN1,VLAN2,VLAN3,VLAN1,VLAN2,VLAN3,如何实现交换机之间的VLAN通信？每个VLAN一条链路？,交换机之间的VLAN通信32,VLAN1,VLAN2,VLAN3,VLAN1,VLAN2,VLAN3,如何实现交换机之间的VLAN通信？只使用一条链路，那么来自多个VLAN的数据如何标识？,交换机之间的VLAN通信33,例如：三个分别来自1、2、3班级的学生，到另一个学校去，分别要参观1、2、3班的上课情况，对方的学校怎么识别他们分别应该去哪个班级？,VLAN标识,交换机给每个去往其他交换机的数据帧打上VLAN标识,VLAN1,VLAN2,VLAN3,VLAN1,VLAN2,VLAN3,中继链路（Trunk）,接入链路（Access）,VLAN1标记,VLAN3标记,VLAN标识的种类,以太网上实现中继可用两种封装类型ISL（Cisco私有协议）IEEE802.1Q,IEEE802.1Q的工作原理和帧格式21,中继链路,接入链路,802.1Q标记4字节,IEEE802.1Q的工作原理和帧格式22,标准以太网帧,TCI,12bit，可标识的VLANID为4096个,带有IEEE802.1Q标记的以太网帧,CiscoISL工作原理和帧格式31,中继链路,VLAN2,接入链路,ISL头26字节,CRC4字节,CiscoISL工作原理和帧格式32,26字节ISL头,4字节ISL尾,CiscoISL工作原理和帧格式33,ISL和802.1Q的异同,相同点都是显式标记，即帧被显式标记了VLAN的信息不同点IEEE802.1Q是公有的标记方式，ISL是Cisco私有的ISL采用外部标记的方法，802.1Q采用内部标记的方法ISL标记的长度为30字节，802.1Q标记的长度为4字节,中继的几种模式和协商21,VLAN1,VLAN2,VLAN3,模式为Access,动态：可以成为Trunk,动态：希望成为Trunk,模式为Trunk,中继的几种模式和协商22,模式,配置接口为Trunk模式,Switch(config)#interfaceinterface-idSwitch(config-if)#switchportmode?accessSettrunkingmodetoACCESSunconditionallydynamicSettrunkingmodetodynamicallynegotiateaccessortrunkmodetrunkSettrunkingmodetoTRUNKunconditionallySwitch(config-if)#switchportmodetrunk,接口为接入模式,接口为动态协商模式,接口为中继模式,配置接口为动态协商模式,Switch(config-if)#switchportmodedynamic?autoSettrunkingmodedynamicnegotiationparametertoAUTOdesirableSettrunkingmodedynamicnegotiationparametertoDESIRABLE,自动,企望,查看接口模式,Switch#showinterfaceinterface-idswitchportName:Fax/xSwitchport:EnabledAdministrativeMode:dynamicdesirableOperationalMode:downAdministrativeTrunkingEncapsulation:dot1qNegotiationofTrunking:OnAccessModeVLAN:1(default)TrunkingNativeModeVLAN:1(default)VoiceVLAN:noneAdministrativeprivate-vlanhost-association:noneAdministrativeprivate-vlanmapping:noneOperationalprivate-vlan:noneTrunkingVLANsEnabled:ALLPruningVLANsEnabled:2-1001CaptureModeDisabledCaptureVLANsAllowed:ALL,接口模式缺省为dynamicdesirable,封装类型为802.1q,配置VLANTrunk实例,VLAN1,VLAN2,VLAN3,VLAN1,VLAN2,VLAN3,Port13,Port410,Port1123,Port24,Port24,SW1,配置VLANTrunk41,第一步：在交换机上添加VLANSW1#vlandatabaseSW1(vlan)#vlan2VLAN2added:Name:VLAN0002SW1(vlan)#vlan3VLAN3added:Name:VLAN0003SW1(vlan)#exitAPPLYcompleted.Exiting.,配置VLANTrunk42,第二步：将接口添加到相应的VLAN中SW1#configterminalSW1(config)#interfacerangef0/4-10SW1(config-if-range)#switchportaccessvlan2SW1(config)#interfacerangef0/11-23SW1(config-if-range)#switchportaccessvlan3,配置VLANTrunk43,第三步：配置交换机之间互联的端口为TrunkSW1(config)#interfacef0/24SW1(config-if)#switchportmodetrunk,配置VLANTrunk44,VLAN1,VLAN2,VLAN3,VLAN1,VLAN2,VLAN3,Port13,Port410,Port1123,Port24,Port24,Port1,Port210,Port11-23,SW2,请学员完成配置,查看端口状态,SW1#showinterfacef0/24switchportName:Fa0/24Switchport:EnabledAdministrativeMode:trunkOperationalMode:trunkAdministrativeTrunkingEncapsulation:dot1qOperationalTrunkingEncapsulation:dot1qNegotiationofTrunking:OnAccessModeVLAN:1(default)TrunkingNativeModeVLAN:1(default)VoiceVLAN:noneAdministrativeprivate-vlanhost-association:noneAdministrativeprivate-vlanmapping:noneOperationalprivate-vlan:noneTrunkingVLANsEnabled:ALLPruningVLANsEnabled:2-1001CaptureModeDisabledCaptureVLANsAllowed:ALL,接口模式配置为Trunk,接口工作模式为Trunk,Trunk协议类型为802.1q,Trunk可以承载所有的VLAN,从Trunk中添加、删除Vlan,去除VLANSwitch(config-if)#switchporttrunkallowedvlanremovevlan-list添加VLANSwitch(config-if)#switchporttrunkallowedvlanaddvlan-list检查中继端口允许VLAN的列表Switch#showinterfaceinterface-idswitchport,从Trunk中删除Vlan配置实例,SW1(config-if)#switchporttrunkallowedvlanremove2SW1(config-if)#endSW1#showinterfacef0/24switchportName:Fa0/24Switchport:EnabledAdministrativeMode:trunkOperationalMode:trunkAdministrativeTrunkingEncapsulation:dot1qOperationalTrunkingEncapsulation:dot1qNegotiationofTrunking:OnAccessModeVLAN:1(default)TrunkingNativeModeVLAN:1(default)VoiceVLAN:noneAdministrativeprivate-vlanhost-association:noneAdministrativeprivate-vlanmapping:noneOperationalprivate-vlan:noneTrunkingVLANsEnabled:1,3-1005PruningVLANsEnabled:2-1001CaptureModeDisabled,V