快速生成树配置(RSTP)

　　//实现：配置快速生成树(RSTP),做冗余备份，并将物理上的环路从逻辑上断开。

　　//环境：

　　Cisco 2960-01

　　Cisco 2960-02

　　PC01

　　PC02

　　//拓扑：如图(快速生成树配置-RSTP)

　　//查看交换机的生成树协议

　　Cisco 2960-01#show spanning-tree

　　//配置Cisco 2960-01

　　Cisco 2960-01>enenable

　　Cisco 2960-01#configure terminal

　　Cisco 2960-01(config)#vlan 2

　　Cisco 2960-01(config-vlan)#exit

　　Cisco 2960-01(config)#interface fastEthernet 0/1

　　Cisco 2960-01(config-if)#switchport access vlan 2

　　Cisco 2960-01(config-if)#exit

　　Cisco 2960-01(config)#interface fastEthernet 0/24

　　Cisco 2960-01(config-if)#switchport mode trunk //设置TRUNK

　　Cisco 2960-01(config-if)#exit

　　Cisco 2960-01(config)#interface fastEthernet 0/23

　　Cisco 2960-01(config-if)#switchport mode trunk //设置TRUNK

　　Cisco 2960-01(config-if)#exit

　　Cisco 2960-01(config)#spanning-tree mode rapid-pvst //修改生成树模式为RSTP

　　//保存配置

　　Cisco 2960-01#write

　　//配置Cisco 2960-02

　　Cisco 2960-02>enenable

　　Cisco 2960-02#configure terminal

　　Cisco 2960-02(config)#vlan 2

　　Cisco 2960-02(config-vlan)#exit

　　Cisco 2960-02(config)#interface fastEthernet 0/1

　　Cisco 2960-02(config-if)#switchport access vlan 2

　　Cisco 2960-02(config-if)#exit

　　Cisco 2960-02(config)#interface fastEthernet 0/24

　　Cisco 2960-02(config-if)#switchport mode trunk

　　Cisco 2960-02(config-if)#exit

　　Cisco 2960-02(config)#interface fastEthernet 0/23

　　Cisco 2960-02(config-if)#switchport mode trunk

　　Cisco 2960-02(config-if)#exit

　　Cisco 2960-02(config)#spanning-tree mode rapid-pvst //修改生成树模式为RSTP

　　//保存配置

　　Cisco 2960-02#write

　　//测试：(终端计算机)

　　VLAN2-PC01>ping 192.168.1.102

　　Pinging 192.168.1.102 with 32 bytes of data:

　　Reply from 192.168.1.102: bytes=32 time=26ms TTL=128

　　Reply from 192.168.1.102: bytes=32 time=14ms TTL=128

　　Ping statistics for 192.168.1.102:

　　Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),

　　Approximate round trip times in milli-seconds:

　　Minimum = 14ms, Maximum = 26ms, Average = 20ms

　　Control-C

　　//禁用正在通信的23号端口，模拟故障

　　Cisco 2960-01#configure terminal

　　Cisco 2960-01(config)#interface fastEthernet 0/23

　　Cisco 2960-01(config-if)#shutdown

　　VLAN2-PC01>ping 192.168.1.102

　　Pinging 192.168.1.102 with 32 bytes of data:

　　Reply from 192.168.1.102: bytes=32 time=11ms TTL=128

　　Ping statistics for 192.168.1.102:

　　Packets: Sent = 1, Received = 1, Lost = 0 (0% loss),

　　Approximate round trip times in milli-seconds:

　　Minimum = 11ms, Maximum = 11ms, Average = 11ms

　　Control-C