分享程序员开发的那些事...
更新时间：2022-10-04 16:19:54
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R1(config)#int lo0
R1(config-if)#ip add 10.1.1.1 255.255.255.0
R1(config-if)#int f0/0
R1(config-if)#no sh
R1(config-if)#ip add 192.168.1.2 255.255.255.0
R1(config-if)#vrrp 1 ip 192.168.1.1
R1(config-if)#vrrp 1 priority 200 （设置VRRP组1的优先级为200）
R1(config-if)#vrrp 1 preempt （对组1 开启抢占）
R1(config-if)#exit
R1(config)#track 10 int lo0 line-protocol （在全局模式下创建对象为10的事件号）
R1(config-track)#int f0/0
R1(config-if)#vrrp 1 track 10 decrement 60（调用跟踪事件10，发现上行链路down后优先级会减60）
R1(config-if)#vrrp 2 ip 192.168.1.254 （在此基础上再建立一个组2，以备负载）
R1(config-if)#vrrp 2 priority 150
R1(config-if)#vrrp 2 preempt
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R2(config-line)#int lo0
R2(config-if)#ip add 10.1.1.1 255.255.255.0
R2(config-if)#int f0/0
R2(config-if)#no sh
R2(config-if)#ip add 192.168.1.3 255.255.255.0
R2(config-if)#vrrp 1 ip 192.168.1.1 (设置组1的虚IP)
R2(config-if)#vrrp 1 priority 150 (针对组1设置相应的优先级。这样R1在组1的状态为backup)
R2(config-if)#vrrp 1 preempt
R2(config-if)#vrrp 2 ip 192.168.1.254
R2(config-if)#vrrp 2 priority 200
R2(config-if)#vrrp 2 preempt
R2(config-if)#exit
R2(config)#track 20 int lo0 line-protocol （在全局模式下创建对象为20的事件号）
R2(config-track)#int f0/0
R2(config-if)#vrrp 2 track 20 decrement 60 （发现上行链路down 降60，这样200-60<150就是backup）
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PC1(config)#no ip routing
PC1(config)#ip default-gateway 192.168.1.1
PC1(config)#int f0/0
PC1(config-if)#no sh
PC1(config-if)#ip add 192.168.1.10 255.255.255.0
PC2(config)#no ip routing
PC2(config)#ip default-gateway 192.168.1.254
PC2(config)#int f0/0
PC2(config-if)#no sh
PC2(config-if)#ip add 192.168.1.20 255.255.255.0
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R1#sh vrrp
*Mar 1 01:01:57.243: %SYS-5-CONFIG_I: Configured from console by console
R1#sh vrrp
FastEthernet0/0 - Group 1
State is Master
Virtual IP address is 192.168.1.1
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 200
Track object 10 state Up decrement 60
Master Router is 192.168.1.2 (local), priority is 200
Master Advertisement interval is 1.000 sec
Master Down interval is 3.218 sec
FastEthernet0/0 - Group 2
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 150
Master Router is 192.168.1.3, priority is 200
Master Advertisement interval is 1.000 sec
Master Down interval is 3.414 sec (expires in 2.778 sec)
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R2#sh vrrp
FastEthernet0/0 - Group 1
State is Backup
Virtual IP address is 192.168.1.1
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 150
Master Router is 192.168.1.2, priority is 200
Master Advertisement interval is 1.000 sec
Master Down interval is 3.414 sec (expires in 2.950 sec)
FastEthernet0/0 - Group 2
State is Master
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 200
Track object 20 state Up decrement 60
Master Router is 192.168.1.3 (local), priority is 200
Master Advertisement interval is 1.000 sec
Master Down interval is 3.218 sec
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R1#sh vrrp brief
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 200 3218 Y Master 192.168.1.2 192.168.1.1
Fa0/0 2 150 3414 Y Backup 192.168.1.3 192.168.1.254
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R2#sh vrrp bri
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 150 3414 Y Backup 192.168.1.2 192.168.1.1
Fa0/0 2 200 3218 Y Master 192.168.1.3 192.168.1.254
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R1(config)#int lo0
R1(config-if)#shutdown
PC1#traceroute
*Mar 1 01:14:22.935: %SYS-5-CONFIG_I: Configured from console by console
PC1#traceroute 10.1.1.1
Type escape sequence to abort.
Tracing the route to 10.1.1.1
1 192.168.1.3 1036 msec * 20 msec
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R1#sh vrrp brief
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 140 3218 Y Backup 192.168.1.3 192.168.1.1
Fa0/0 2 150 3414 Y Backup 192.168.1.3 192.168.1.254
R2#sh vrrp bri
Interface Grp Pri Time Own Pre State Master addr Group addr
Fa0/0 1 150 3414 Y Master 192.168.1.3 192.168.1.1
Fa0/0 2 200 3218 Y Master 192.168.1.3 192.168.1.254
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