PingingLab传世经典系列《CCNA完全配置宝典》-3.10 PVST基本配置

3.10 PVST基本配置实验目的：
1、掌握PVST的基本配置。
2、理解PVST的负载均衡原理。
实验拓扑：



实验步骤：1、依据图中拓扑部署PVST技术，其中SW1为VLAN10的Root，VLAN20的Secondary，SW2为VLAN20的Root，VLAN10的Secondary，配置如下：SW1(config)#spanning-tree vlan 10 root primarySW1(config)#spanning-tree vlan 20 root secondarySW2(config)#spanning-tree vlan 20 root primarySW2(config)#spanning-tree vlan 10 root secondary2、查看STP状态，如下：SW1上：SW1#show spanning-tree vlan 10 briefVLAN10 Spanning tree enabled protocol ieee Root ID Priority 8192 Address cc05.0810.0001This bridge is the root Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 8192 Address cc05.0810.0001 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300Interface DesignatedName Port ID Prio Cost Sts Cost Bridge ID Port ID-------------------- ------- ---- ----- --- ----- -------------------- -------FastEthernet0/0 128.1 128 19 FWD 0 8192 cc05.0810.0001 128.1 FastEthernet0/1 128.2 128 19 FWD 0 8192 cc05.0810.0001 128.2可以看到，SW1已经成为VLAN 10的主根。SW2上：SW2#show spanning-tree vlan 20 briefVLAN20 Spanning tree enabled protocol ieee Root ID Priority 8192Address cc06.0810.0002This bridge is the root Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 8192 Address cc06.0810.0002 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300Interface DesignatedName Port ID Prio Cost Sts Cost Bridge ID Port ID-------------------- ------- ---- ----- --- ----- -------------------- -------FastEthernet0/0 128.1 128 19 FWD 0 8192 cc06.0810.0002 128.1 FastEthernet0/2 128.3 128 19 FWD 0 8192 cc06.0810.0002 128.3 可以看到，SW2已经成为VLAN 20的主根。SW3上：SW3#show spanning-tree vlan 10 briefVLAN10 Spanning tree enabled protocol ieee Root ID Priority 8192 Address cc05.0810.0001 Cost 19 Port 2 (FastEthernet0/1) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32768 Address cc07.0810.0001 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300Interface DesignatedName Port ID Prio Cost Sts Cost Bridge ID Port ID-------------------- ------- ---- ----- --- ----- -------------------- -------FastEthernet0/1 128.2 128 19 FWD 0 8192 cc05.0810.0001 128.2 FastEthernet0/2 128.3 128 19 BLK 19 16384 cc06.0810.0001 128.3 SW3#show spanning-tree vlan 20 briefVLAN20 Spanning tree enabled protocol ieee Root ID Priority 8192 Address cc06.0810.0002 Cost 19 Port 3 (FastEthernet0/2) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32768 Address cc07.0810.0002 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300Interface DesignatedName Port ID Prio Cost Sts Cost Bridge ID Port ID-------------------- ------- ---- ----- --- ----- -------------------- -------FastEthernet0/1 128.2 128 19 BLK19 16384 cc05.0810.0002 128.2 FastEthernet0/2 128.3 128 19 FWD 0 8192 cc06.0810.0002 128.3 从上面可以看到，SW3在VLAN10所在生成树中阻塞F0/2，在VLAN20所在生成树阻塞F0/1，通过此方法可以实现负载均衡。此实验完成。==========================================PingingLab·高品质IT教育提供商CCIE 实验室·IT项目实战·高端人才定制深圳拼客信息科技有限公司·广州大学城外环西路站新浪微博：@拼客科技PingingLab @PingingLab-陈鑫杰PingingLab微信公众号：pinginglab PingingLab技术交流群：240920680

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