hspf协议，是一中路有容错协议，也叫作备份路由协议。

            sw1                                                             sw2

   

                                        pc

sw1：

Switch>en

Switch#conf t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#in

Switch(config)#interface fa0/1

Switch(config-if)#sw

Switch(config-if)#switchport mode dynamic desirable

 

Switch(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

Switch(config-if)#switchport mode trunk

 

 

%SYS-5-CONFIG_I: Configured from console by console

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#interface fa0/1

Switch(config-if)#no switchport

Switch(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

 

Switch(config-if)#ip address 192.168.4.2 255.255.255.0

Switch(config-if)#exit

Switch(config)#interface fa0/1

Switch(config-if)#standby priority 200                             //优先级

Switch(config-if)#standby preempt                                  //抢先权

Switch(config-if)#standby ip 192.168.4.4                        //指定虚拟路由

Switch(config-if)#exit

sw2:

Switch>en

Switch#conf t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)#interface fa0/1

Switch(config-if)#switchport mode dynamic desirable

 

Switch(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

 

Switch(config-if)#switchport mode trunk

Switch(config-if)#exit

Switch(config)#interface fa0/1

Switch(config-if)#no switchport

Switch(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down

 

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

 

Switch(config-if)#ip address 192.168.4.3 255.255.255.0

Switch(config-if)#standby priority 100

Switch(config-if)#standby preempt

Switch(config-if)#standby ip 192.168.4.4

Switch(config-if)#exit

Switch(config)#

 验证：

ping 192.168.4.4

通                               配置正确

不通                           配置错误