VRRP基础配置

拓扑图

 

实验过程

 

1.       pc的配置

Router>en Router#conf t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host pc pc(config)#no ip routing pc(config)#int f0/0 pc(config-if)#no shut pc(config-if)#ip add 192.168.1.1 255.255.255.0 pc(config-if)#exit pc(config)#ip default-gateway 192.168.1.254 pc(config)#end

2.       R1的配置

Router>en Router#conf t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host R1 R1(config)#int f0/0 R1(config-if)#no shut R1(config-if)#ip add 192.168.1.10 255.255.255.0 R1(config-if)#vrrp 10 ip 192.168.1.254  //配置vrrp组10的IP R1(config-if)#end

3.       R2的配置

Router>en Router#conf t Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#no ip domain-lookup Router(config)#line con 0 Router(config-line)#no exec-timeout Router(config-line)#loggin syn Router(config-line)#exit Router(config)#host R2 R2(config)#int f0/0 R2(config-if)#no shut R2(config-if)#ip add 192.168.1.20 255.255.255.0 R2(config-if)#vrrp 10 ip 192.168.1.254 R2(config-if)#end

4.       查看vrrp信息

R1#show vrrp bri Interface          Grp Pri Time  Own Pre State   Master addr     Group addr Fa0/0              10  100 3609       Y  Backup  192.168.1.20    192.168.1.254 R2#show vrrp bri Interface          Grp Pri Time  Own Pre State   Master addr     Group addr Fa0/0              10  100 3609       Y  Master  192.168.1.20    192.168.1.254

说明：现在R1是Backup Router，R2是Master Router，R2处于转发状态。

 

5.       关闭R2的f0/0，模拟故障。

R2(config)#int f0/0 R2(config-if)#shut R1#show vrrp br Interface          Grp Pri Time  Own Pre State   Master addr     Group addr Fa0/0          10  100 3609       Y  Master  192.168.1.10    192.168.1.254

说明：现在R1是Master Router，处于转发状态

6.       测试连通性

pc#ping 192.168.1.254        Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.1.254, timeout is 2 seconds: .!!!! Success rate is 80 percent (4/5), round-trip min/avg/max = 12/40/64 ms pc#traceroute 192.168.1.254   Type escape sequence to abort. Tracing the route to 192.168.1.254     1 192.168.1.10 56 msec *  36 msec   //pc现在走R1