第一步：配置R2，R4和R5R2上的配置：interface Loopback0ip address 2.2.2.2 255.255.255.0!interface FastEthernet0/0ip
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第一步：配置R2，R4和R5
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
R4上的配置：
interface FastEthernet0/0
ip address 192.168.1.4 255.255.255.0
ip default-gateway 192.168.1.254
R5上的配置：
interface FastEthernet0/0
ip address 192.168.1.5 255.255.255.0
ip default-gateway 192.168.1.253
第二步：配置R1
track 100 interface FastEthernet0/0 line-protocol
//通过track 后面为组号，接着为要追踪的接口
interface FastEthernet0/0
ip address 12.0.0.1 255.255.255.0
!
interface FastEthernet0/1
ip address 192.168.1.1 255.255.255.0
no ip redirects
no ip proxy-arp
//上面两句为关闭重定向，和关闭代理arp
//我们在下面定义了两个组
vrrp 1 ip 192.168.1.254
vrrp 1 priority 105
vrrp 1 track 100
//这里和hsrp不同的是，vrrp要在全局下先定义，然后在这里调用，不然调用不起来
vrrp 2 ip 192.168.1.253
!
router rip
version 2
network 12.0.0.0
network 192.168.1.0
no auto-summary
第三步：配置R3
track 200 interface FastEthernet0/0 line-protocol
!
!
!
!
!
interface FastEthernet0/0
ip address 23.0.0.3 255.255.255.0
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.1.3 255.255.255.0
no ip redirects
no ip proxy-arp
duplex auto
speed auto
vrrp 1 ip 192.168.1.254
vrrp 2 ip 192.168.1.253
vrrp 2 priority 105
vrrp 2 track 200
!
router rip
version 2
network 23.0.0.0
network 192.168.1.0
no auto-summary
第四步：调试
当网络正常时：在R1和R3上的case
R1#sh vrrp
FastEthernet0/1 - Group 1
State is Master
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 105
Track object 100 state Up decrement 10
Master Router is 192.168.1.1 (local), priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec
FastEthernet0/1 - Group 2
State is Backup
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.3, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.009 sec)
R3#sh vrrp
FastEthernet0/1 - Group 1
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.1, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 2.689 sec)
FastEthernet0/1 - Group 2
State is Master
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 105
Track object 200 state Up decrement 10
Master Router is 192.168.1.3 (local), priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec
第五步：一个一个测试
先从R4来：
R1的外网接口Down 和up
在R1、R3和R4上出现的logging
R1上出现下列logging
R1(config)#int f0/0
R1(config-if)#sh
Apr 24 00:06:49.927: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Master -> Backup
R1(config-if)#no sh
Apr 24 00:06:57.083: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Backup -> Master
R1#sh vrrp
FastEthernet0/1 - Group 1
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 95 (cfgd 105) //优先级降到了95
Track object 100 state Down decrement 10
Master Router is 192.168.1.3, priority is 100
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec (expires in 2.669 sec)
FastEthernet0/1 - Group 2
State is Backup
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.3, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.125 sec)
R3上出现：
#
Apr 24 00:06:29.779: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Master -> Backup
Apr 24 00:06:49.635: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Backup -> Master
*Apr 24 00:06:56.935: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Master -> Backup
R4上出现：
R4-pc4#ping 2.2.2.2 re 33333
Type escape sequence to abort.
Sending 33333, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!U.U.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.
Success rate is 96 percent (188/195), round-trip min/avg/max = 44/85/296 ms
//这里的切换更快，因为hello包为1s一个
在R5上测试，把R3的接口down后up，R5会出现下列所示
R5-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.U.....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!.
Success rate is 95 percent (217/227), round-trip min/avg/max = 44/85/1128 ms
R5-pc5#
R3上show vrrp
R3#sh vrrp
FastEthernet0/1 - Group 1
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.1, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.353 sec)
FastEthernet0/1 - Group 2
State is Backup
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 95 (cfgd 105)
Track object 200 state Down decrement 10
Master Router is 192.168.1.1, priority is 100
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec (expires in 2.941 sec)
