生成树典型配置举例

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12。312。3层设备，DeviceCDeviceDDeviceCDeviceDVLAN11～20报文、VLAN21～30DeviceADeviceB，实现流量负载分担和链路备份MSTP图MSTDeviceDevicePermit:VLAN11toVLAN11-20VLAN21-30DeviceDevice1MST（修订级别（缺省为0，无需配置表（VLANMSTI1，VLANMSTI为了使MSTIMST（修订级别（缺省为0，无需配置表（VLANMSTI1，VLANMSTI为了使MSTI1和MSTI2拓扑中的上行链路不同并互相作为冗余备份，配置DeviceA为1的根桥，DeviceB为MSTI2的根桥。另外，本例中配置DeviceA、B、C、D在MSTI0的优先级依次降低，使DeviceA成为IST2所示。各VLAN对应的生成树实例的拓图0.7425-8a02-A32768.0cda-41b1-B32768.7425-8a02-A0.0cda-41b1-BC32768.00e0-fc00-D32768.7425-8a0f-CD32768.7425-8a0f-32768.00e0-fc00-VLAN11-20对应的MSTIVLAN21-30对应的MSTI0.7425-8a02-A4096.0cda-41b1-B未被协议阻断的链CD被协议阻断的链32768.00e0-fc00-36864.7425-8a0f-其他VLAN对应的MSTI本举例是在S5130EI_E-CMW710-R3106版本上进行配置和验证的3.4.1配置Device#vlan11to30erfacerangegigabitethernet1/0/1togigabitethernet[DeviceA-if-range]portlink-type2MSTporttrunkpermitvlan11totestVLANMSTI1，VLANMSTI2[DeviceA]stpMSTporttrunkpermitvlan11totestVLANMSTI1，VLANMSTI2[DeviceA]stpregion-region-nametestinstance1vlan11toinstance2vlan21to30activeregion-configurationMSTI01[DeviceA]stpinstance0to1root[DeviceA]stpglobal配置Device#vlan11to30erfacerangegigabitethernet1/0/1togigabitethernetMSTportlink-typeporttrunkpermitvlan11to30testVLANMSTI1，VLANMSTI2[DeviceB]stpregion-region-nametestinstance1vlan11toinstance2vlan21to30activeregion-configurationMSTI2MSTI0[DeviceB]stpinstance2rootprimary[DeviceBstpinstance0rootsecondary#全局使能生成树协议。[DeviceB]stpglobal配置Device#vlan11to30erfacerangegigabitethernet1/0/1togigabitethernetMSTportlink-typeporttrunkpermitvlan11to30testVLANMSTI1，VLANMSTI23[DeviceC]stpregion-region-nametestinstance1vlan11toinstance2vlan21toactiveregion-configuration[DeviceC]stpglobal配置Device[DeviceC]stpregion-region-nametestinstance1vlan11toinstance2vlan21toactiveregion-configuration[DeviceC]stpglobal配置Device#vlan11to30erfacerangegigabitethernet1/0/1togigabitethernetMSTportlink-typeporttrunkpermitvlan11to30testVLANMSTI1，VLANMSTI2[DeviceD]stpregion-#配置本设备在region-nametestinstance1vlan11toinstance2vlan21to30activeregion-configuration0的优先级为36864，从而使本设备在MSTI0Device32768[DeviceD]stpinstance0priority[DeviceD]stpglobal3.5DeviceAdisplaystpbrief00111STPe224 ALTEDISCARDINGDeviceBdisplaystpbrief001STPe1222DeviceCdisplaystp0STPeDeviceBdisplaystpbrief001STPe1222DeviceCdisplaystp0STPe1122DeviceDdisplaystpSTPe012根据上述显示信息中的Alternate端口（阻塞端口，可以绘出各VLAN所对应MSTI5 ALTEDISCARDING ALTEDISCARDING ALTEDISCARDING ALTEDISCARDING ALTEDISCARDING图3MSTI0～2可以看到，DeviceCDeviceDVLAN11～20VLAN21～30DeviceCGE1/0/1图3MSTI0～2可以看到，DeviceCDeviceDVLAN11～20VLAN21～30DeviceCGE1/0/1（DeviceCMSTI0～1中的上行链路所在端口DeviceA、B、C、D上生成树的简要信息displaystpbriefdisplaystpbriefdisplaystpbrief01122STPe00111222STPe1STPe62displaystpbriefSTPe012根据上述显示信息中的Alternate端口（阻塞端口，可以绘出各VLAN所对应MSTI42displaystpbriefSTPe012根据上述显示信息中的Alternate端口（阻塞端口，可以绘出各VLAN所对应MSTI4图4MSTI0～2可以看到，DeviceCMSTI0～1GE1/0/1GE1/0/23.6##Device111tostpregion-configurationregion-nametestinstance1vlan11toinstance2vlan21to30activeregion-configuration#stpinstance0to1root7 ALTEDISCARDING ALTEDISCARDING ALTEDISCARDINGstpglobalenableerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/2portlink-typetrunkstpglobalenableerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/3portlink-typetrunkporttrunkpermitvlan111###Device111tostpregion-configurationregion-nametestinstance1vlan11toinstance2vlan21to30activeregion-configuration##instance0rootinstance2rootprimaryglobalenableerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/3portlink-typetrunkporttrunkpermitvlan111###Device111to8stpregion-configurationregion-nametestinstance1vlan11toinstance2vlan21to30activeregion-configuration#stpglobalstpregion-configurationregion-nametestinstance1vlan11toinstance2vlan21to30activeregion-configuration#stpglobalenableerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan111###Device111tostpregion-configurationregion-nametestinstance1vlan11toinstance2vlan21to30activeregion-configuration#stpinstance0priority36864stpglobalenable#erfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan111toerfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan111#DeviceADeviceB为汇聚层设备，DeviceCDeviceD为接入层设备。9图VLAN10、20、30中的报文分别按图VLAN10、20、30中的报文分别按照其VLAN所对应的生成树转发PVSTVLANVLANVLAN所DeviceAVLAN1030对应生成树的根桥，DeviceBVLAN20对应生成树的根桥。当设备在指定VLAN中被配置为根桥时，其优先级强制变为0；由于各端口路径开销相同，根据STP算法可以得到各VLAN6所示。图各VLAN所对应生成树的拓扑4.3本举例是在S5130EI_E-CMW710-R3106版本上进行配置和验证的4.44.4.1配置Device#4.3本举例是在S5130EI_E-CMW710-R3106版本上进行配置和验证的4.44.4.1配置Device#<DeviceA>system-view[DeviceA]vlan10vlanvlan30erfacelink-typetrunktrunkpermitvlanerfacelink-typetrunktrunkpermitvlanerfacelink-typetrunktrunkpermitvlanPVST[DeviceA]stpmodeVLAN1030[DeviceA]stpvlan1030root[DeviceA]stpglobal配置Device#<DeviceB>system-view[DeviceB]vlan10vlanvlan30erfacelink-typetrunkpermitvlan20erfacelink-typetrunkpermitvlan10erfacelink-typetrunkpermitvlanlink-typetrunkpermitvlan10erfacelink-typetrunkpermitvlan1020PVST[DeviceB]stpmodeVLAN20[DeviceB]stpvlan20root[DeviceB]stpglobal配置DeviceVLAN1020TrunkVLAN<DeviceC>system-view[DeviceC]vlan10[DeviceC-vlan10]vlan[DeviceC-vlan20]erfacerangegigabitethernet1/0/1gigabitethernetportlink-typeporttrunkpermitvlan1020PVST[DeviceC]stpmode[DeviceC]stpglobal配置DeviceVLAN2030TrunkVLAN<DeviceD>system-view[DeviceD]vlan20[DeviceD-vlan20]vlan[DeviceD-vlan30]erfacerangegigabitethernet1/0/1gigabitethernetportlink-typeporttrunkpermitvlan2030PVST[DeviceD]stpmode[DeviceD]stpglobalDeviceAdisplaystpbrief11STPeDeviceBdisplaystpbrief11STPeDeviceAdisplaystpbrief11STPeDeviceBdisplaystpbrief11STPeDeviceCdisplaystpbrief1STPeDeviceDdisplaystpbrief1STPe ALTEDISCARDING ALTEDISCARDING ALTEDISCARDING ALTEDISCARDING根据上述显示信息中VLAN10、2030的Alternate端口（阻塞端口，可以绘出各VLAN所对应7所示。图根据上述显示信息中VLAN10、2030的Alternate端口（阻塞端口，可以绘出各VLAN所对应7所示。图7VLAN10、20、30可以看到，PVSTVLANVLAN##Device1vlan1030rootprimarymodepvstglobalerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan11020erfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan120#erfaceGigabitEthernet1/0/3portlink-typetrunkporttrunkpermitvlan110###erfaceGigabitEthernet1/0/3portlink-typetrunkporttrunkpermitvlan110###Device1vlan20rootprimarymodepvstglobalerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan12030erfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan11020erfaceGigabitEthernet1/0/3portlink-typetrunkporttrunkpermitvlan110###Device1modeglobalerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan11020erfaceportlink-typeporttrunkpermitvlan110###Device1porttrunkpermitvlan110###Device1modeglobalerfaceGigabitEthernet1/0/1portlink-typetrunkporttrunkpermitvlan12030erfaceGigabitEthernet1/0/2portlink-typetrunkporttrunkpermitvlan120#5RSTPDeviceA层设备，DeviceB、DeviceC为汇聚层设备，DeviceD、DeviceERSTPDeviceADeviceCDeviceBDeviceBDeviceCDeviceD、EBPDU图RSTPDeviceCDeviceBDeviceB图RSTPDeviceCDeviceBDeviceBDeviceB的优先级为4096，DeviceC8192A的MAC地址小于DeviceB（如9所示，配置DeviceA4096就可以使它成为stprootprimarystppriority00可以在完成本例的配置步骤后，在各设备上用displaystpbrief命令查找角色为DESI或者根据STP图9RSTP4096.0000-fc00-A未被协议阻断的链8192.0cda-41b1-被协议阻断的链4096.7425-8a02-BC指定端阻塞端DE图9RSTP4096.0000-fc00-A未被协议阻断的链8192.0cda-41b1-被协议阻断的链4096.7425-8a02-BC指定端阻塞端DE32768.00e0-fc00-32768.7425-8a0f-5.3本举例是在S5130EI_E-CMW710-R3106版本上进行配置和验证的5.45.4.1配置DeviceRSTP<DeviceA>system-view[DeviceA]stpmoderstp4096[DeviceA]stppriority[DeviceA]stpglobalDeviceB、Cerfacerangegigabitethernet1/0/1[DeviceA-if-range]stp[DeviceA-if-range]配置DeviceRSTP<DeviceB>system-view[DeviceB]stpmoderstp4096[DeviceB]stppriority[DeviceB]stpglobalerfacerange[DeviceB-if-range]stp[DeviceB-if-range]配置DeviceRSTP<DeviceC>system-view[DeviceC]stpmoderstp8192[DeviceC]stppriority[DeviceC]stpglobalerfacerange[DeviceB-if-range]stp[DeviceB-if-range]配置DeviceRSTP<DeviceC>system-view[DeviceC]stpmoderstp8192[DeviceC]stppriority[DeviceC]stpglobalerfacerange[DeviceC-if-range]stp[DeviceC-if-range]配置DeviceD、DeviceD、EDeviceDRSTP<DeviceD>system-view[DeviceDstpmoderstp#全局使能生成树协议。[DeviceD]stpglobal#将与用户直接相连的端口配置为边缘端口（此处仅以BPDU保护功能，并使能erfacegigabitethernet[DeviceD-GigabitEthernet1/0/4]stpedged-port[DeviceD-GigabitEthernet1/0/4]quit[DeviceD]stp5.5DeviceAdisplaystpbrief0STPeFORWARDINGFORWARDINGDeviceB[DeviceB]displaystpMSTSTPe0000DeviceCdisplaystpbrief0STPe0DeviceDdisplaystpbrief0STPe0DeviceEdisplaystpSTPe000000DeviceCdisplaystpbrief0STPe0DeviceDdisplaystpbrief0STPe0DeviceEdisplaystpSTPe00，可以绘出10所示。图10RSTPA根设未被协议阻断的链BC被协指定端DE阻塞端初始状态，DeviceDDeviceA[DeviceD]display-------[CISTBridgeIDBridgetimesInfo][ModeRSTP]------:32768.00e0-fc00-:o2sMaxAge20sFwdDelay15sMaxHops ALTEDISCARDING ALTEDISCARDING ALTEDISCARDINGRoot :4096.0000-fc00-47cd,RegRoot:32768.00e0-fc00-c518,可以看到，DeviceDIDDeviceAID#DeviceD0（DeviceA的优先级更高DeviceD认为自己是根桥，并往Root :4096.0000-fc00-47cd,RegRoot:32768.00e0-fc00-c518,可以看到，DeviceDIDDeviceAID#DeviceD0（DeviceA的优先级更高DeviceD认为自己是根桥，并往外发送根桥ID0.00e0-fc00-c518BPDU[DeviceD]stppriority0[DeviceD]displaystp-------[CISTBridgeIDBridgetimesInfo][ModeRSTP]------:0.00e0-fc00-:o2sMaxAge20sFwdDelay15sMaxHopsRoot :0.00e0-fc00-c518,RegRoot:0.00e0-fc00-c518,#DeviceE0ID0.7425-8a0f-8000BPDU。[DeviceE]stppriority0[DeviceE]displaystp-------[CISTBridgeIDBridgetimesInfo][ModeRSTP]------:0.7425-8a0f-:o2sMaxAge20sRoot :0.7425-8a0f-8000,RegRoot:0.7425-8a0f-8000,DeviceB、C[DeviceB]display-------[CISTBridgeIDBridgetimesInfo][ModeRSTP]------:4096.7425-8a02-:o2sMaxAge20sRoot :4096.0000-fc00-47cd,RegRoot:4096.7425-8a02-4c00,[DeviceC]display-------[CISTBridgeIDBridgetimesInfo][ModeRSTP]------:8192.0cda-41b1-:o2sMaxAge20sRoot :4096.0000-fc00-47cd,RegRoot:8192.0cda-41b1-d1c0,DeviceB、CIDDeviceAIDDeviceB、CDeviceD、EBPDU影响。#DeviceB的指定端口（DeviceEGigabitEthernet1/0/2）去掉根保护功DeviceBDeviceA失去根桥的地位，引起网络拓扑结构的错误变动。erfacegigabitethernet[DeviceB-GigabitEthernet1/0/2]undostp[DeviceB-GigabitEthernet1/0/2]display-------[CISTBridgeIDBridgetimesInfo][ModeRSTP]------:4096.