23-Root Guard根防护 //IOU模拟

23-Root Guard根防护 //IOU模拟

IOU2(config)#int range e1/0 - 1IOU2(config-if-range)#no shutdown IOU2(config-if-range)#switchport trunk encapsulation dot1q IOU2(config-if-range)#switchport mode trunk

IOU3(config)#int range e1/0 - 1IOU3(config-if-range)#no shutdownIOU3(config-if-range)#switchport trunk encapsulation dot1qIOU3(config-if-range)#switchport mode trunk

IOU3(config)#int e1/2IOU3(config-if)#no shutdown IOU3(config-if)#switchport mode access

2、重点命令：IOU3(config)#int e1/2IOU3(config-if)#no shutdown IOU3(config-if)#spanning-tree guard rootIOU3(config-if)#*Apr 26 06:19:34.814: %SPANTREE-2-ROOTGUARD_CONFIG_CHANGE: Root guard enabled on port Ethernet1/2

IOU3#show spanning-tree vlan 1Et0/0 Desg FWD 100 128.1 Shr Et0/1 Desg FWD 100 128.2 Shr Et0/2 Desg FWD 100 128.3 Shr Et0/3 Desg FWD 100 128.4 Shr Et1/0 Altn BLK 100 128.5 Shr Et1/1 Root FWD 100 128.6 Shr Et1/2 Desg FWD 100 128.7 Shr

接着在Hacker上做：Hacker(config)#spanning-tree vlan 1 priority 0IOU3上提示：*Apr 26 06:23:14.796: %SPANTREE-2-ROOTGUARD_BLOCK: Root guard blocking port Ethernet1/2 on VLAN0001.

结果验证：IOU3#show spanning-tree vlan 1VLAN0001Interface Role Sts Cost Prio.Nbr TypeEt0/0 Desg FWD 100 128.1 Shr Et0/1 Desg FWD 100 128.2 Shr Et0/2 Desg FWD 100 128.3 Shr Et0/3 Desg FWD 100 128.4 Shr Et1/0 Altn BLK 100 128.5 Shr Et1/1 Root FWD 100 128.6 Shr Et1/2 Desg BKN100 128.7 Shr ROOT_Inc

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