第一步：配置R2、pc4和pc5R4上的配置：interface FastEthernet0ip address 192.168.1.4 255.255.255.0ip default-gateway
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第一步：配置R2、pc4和pc5
R4上的配置：
interface FastEthernet0
ip address 192.168.1.4 255.255.255.0
ip default-gateway 192.168.1.254
R5上的配置
interface FastEthernet0
ip address 192.168.1.5 255.255.255.0
ip default-gateway 192.168.1.253
R2上的配置
interface Loopback0
ip address 2.2.2.2 255.255.255.0
!
interface FastEthernet0/0
ip address 12.0.0.2 255.255.255.0
!
interface FastEthernet1/0
ip address 23.0.0.2 255.255.255.0
!
router rip
version 2
network 2.0.0.0
network 12.0.0.0
network 23.0.0.0
no auto-summary
第二步：配置sw1和sw3
SW1上的配置：
interface FastEthernet0/0
no switchport
ip address 12.0.0.1 255.255.255.0
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
no ip redirects
no ip proxy-arp
standby 1 ip 192.168.1.254
standby 1 priority 105
standby 1 preempt
standby 1 track FastEthernet0/0
standby 2 ip 192.168.1.253
standby 2 preempt
//以上命令说明了配置standby多组的命令
router rip
version 2
network 12.0.0.0
network 192.168.1.0
no auto-summary
SW3上的配置：
interface FastEthernet0/0
no switchport
ip address 23.0.0.3 255.255.255.0
!
interface Vlan1
ip address 192.168.1.3 255.255.255.0
no ip redirects
no ip proxy-arp
standby 1 ip 192.168.1.254
standby 1 preempt
standby 2 ip 192.168.1.253
standby 2 priority 105
standby 2 preempt
standby 2 track FastEthernet0/0
!
router rip
version 2
network 23.0.0.0
network 192.168.1.0
no auto-summary
第三步：测试
- 我们先直接对SW1的外网进行测试
SW1上的情况：
sw1(config)#int f0/0
sw1(config-if)#sh
Mar 1 02:08:19.511: %TRACKING-5-STATE: 1 interface Fa0/0 line-protocol Up->Down
Mar 1 02:08:22.391: %HSRP-5-STATECHANGE: Vlan1 Grp 1 state Active -> Speak
sw1(config-if)#no sh
Mar 1 02:08:27.311: %TRACKING-5-STATE: 1 interface Fa0/0 line-protocol Down->Up
Mar 1 02:08:28.423: %HSRP-5-STATECHANGE: Vlan1 Grp 1 state Speak -> Active
//上面几步，我们对外网接口down和up后，分别出现了speak和active，表明它原抢了回来
SW2上的情况：
*Mar 1 02:08:22.351: %HSRP-5-STATECHANGE: Vlan1 Grp 1 state Standby -> Active
Mar 1 02:08:28.575: %HSRP-5-STATECHANGE: Vlan1 Grp 1 state Active -> Speak
Mar 1 02:08:38.575: %HSRP-5-STATECHANGE: Vlan1 Grp 1 state Speak -> Standby
//从上面我们看到了这样的情况，当SW1的接口down后，它成为了active，当SW1的外网接口好了时，它以变为standby
//下面为pc4的通信情况：
pc4#ping 2.2.2.2 re 3333333
Type escape sequence to abort.
Sending 3333333, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!U.U.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!.
Success rate is 98 percent (441/447), round-trip min/avg/max = 20/42/1148 ms
- 我们再对SW3的进行测试
//下面的解释我就不说了，和上面是一样的
sw3(config)#int f0/0
sw3(config-if)#sh
Mar 1 02:20:28.367: %TRACKING-5-STATE: 1 interface Fa0/0 line-protocol Up->Down
Mar 1 02:20:29.159: %HSRP-5-STATECHANGE: Vlan1 Grp 2 state Active -> Speak
sw3(config-if)#no sh
Mar 1 02:20:39.159: %HSRP-5-STATECHANGE: Vlan1 Grp 2 state Speak -> Standby
Mar 1 02:20:40.243: %TRACKING-5-STATE: 1 interface Fa0/0 line-protocol Down->Up
*Mar 1 02:20:41.239: %HSRP-5-STATECHANGE: Vlan1 Grp 2 state Standby -> Active
Mar 1 02:20:29.079: %HSRP-5-STATECHANGE: Vlan1 Grp 2 state Standby -> Active
Mar 1 02:20:41.279: %HSRP-5-STATECHANGE: Vlan1 Grp 2 state Active -> Speak
*Mar 1 02:20:51.279: %HSRP-5-STATECHANGE: Vlan1 Grp 2 state Speak -> Standby
pc5#
pc5#ping 2.2.2.2 re 222222
Type escape sequence to abort.
Sending 222222, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!U.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Success rate is 99 percent (837/840), round-trip min/avg/max = 4/38/120 ms
