第3章交换机本章目标授课重点授课方法Cisco交换机介绍（补充知识点）CiscoCatalystSwitchCatalystSwitchPositionCatalyst1900Catalyst1900wg_sw_a#shmac-address-tablemac-address-tablepermanent{mac-addresstypemodule/port}单模光纤(10Km)2GBICports默认优先级32768主机X向路由器Y发送一个单播帧2个100BaseTX端口或2个100BaseFX端口;wg_sw_a(config)#address-violation{suspend|disable|ignore}HighperformanceIProuting分组：根据实验机与学生数量确定实验小组Catalyst3550-48Catalyst3550SeriesIntelligentEthernetSwitchesB604FastEthernet0/26DynamicAllISL/802.1QVLAN模块FromCatalyst2900toCatalyst2950Catalyst3500XLSeriesCatalyst3524-PWRSeriesXLIPInlinePowerCatalyst3550SeriesIntelligentEthernetSwitches3.1二层交换机的功能3.1.1学习地址3.1.1学习地址（续）3.1.1学习地址（续）3.1.2转发及过滤帧主机D发送一个广播或者组播帧广播和组播帧将泛洪到除了原始端口外的所有端口3.1.3消除循环网段1网段1网段13.1.3.4多个回路问题Ethernet0/11DisabledN/AEthernet0/3DisabledN/A默认优先级32768(8000hex)MAC0c0022222222Stackable,1RU默认优先级32768copytftp://host/src_filenvram单端口1000BaseX插槽模块Ethernet0/5DisabledN/AFEC/GEC…),提供最佳的总体网络性能Ethernet0/6DisabledN/ACatalyst3550SeriesIntelligentEthernetSwitchesB604FastEthernet0/26DynamicAll冗余的拓扑结构（了解）Catalyst3512XL管理MAC地址表（掌握）每个网络一个根桥每个非根桥一个根端口每个网段一个指定端口交换机Y默认的优先级32768(8000hex)物理地址0c00222222223.2.3生成树协议中根端口的选择方法3.2.4生成树协议中指定端口的选择方法SwitchY默认优先级32768MAC0c0022222222阻塞监听学习转发3.2.7生成树的重新计算直接转发交换机检验到目的地址就立刻转发帧3.4管理MAC地址表3.5管理配置文件wg_sw_d#deletenvram补充知识点wg_sw_a(config)#wg_sw_a(config)#wg_sw_a#shmac-address-tableNumberofpermanentaddresses:1Numberofrestrictedstaticaddresses:0Numberofdynamicaddresses:4AddressDestInterfaceTypeSourceInterfaceList--------------------------------------------------------------------------------------------------------------00E0.1E5D.AE2FEthernet0/2DynamicAll2222.2222.2222Ethernet0/3PermanentAll00D0.588F.B604FastEthernet0/26DynamicAll00E0.1E5D.AE2BFastEthernet0/26DynamicAll00D0.5892.38C4FastEthernet0/27DynamicAllwg_sw_a(config)#wg_sw_a(config)#mac-address-tablerestrictedstatic1111.1111.1111e0/4e0/1wg_sw_a#shmac-address-tableNumberofpermanentaddresses:1Numberofrestrict