网关路由器的冗余设计与配置
1.使用OSPF配置路由器之间的连通
[r1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
[r1-GigabitEthernet0/0/1]ip add 10.1.1.253 24
[r1-ospf-1-area-0.0.0.0]network 12.1.1.1 0.0.0.255
[r1-ospf-1-area-0.0.0.0]network 10.1.1.253 0.0.0.255
[r2-GigabitEthernet0/0/0]ip add 23.1.1.2 24
[r2-GigabitEthernet0/0/1]ip add 10.1.1.252 24
[r2-ospf-1-area-0.0.0.0]network 23.1.1.2 0.0.0.255
[r2-ospf-1-area-0.0.0.0]network 10.1.1.252 0.0.0.255
[Internet-GigabitEthernet0/0/0]ip add 12.1.1.3 24
[Internet-GigabitEthernet0/0/1]ip add 23.1.1.3 24
[Internet-LoopBack0]ip add 3.3.3.3 32
[Internet-ospf-1-area-0.0.0.0]network 12.1.1.3 0.0.0.255
[Internet-ospf-1-area-0.0.0.0]network 23.1.1.3 0.0.0.255
[Internet-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
2.配置VRRP
[r1-GigabitEthernet0/0/1]vrrp vrid 2 virtual-ip 10.1.1.254
[r1-GigabitEthernet0/0/1]vrrp vrid 2 priority 120 //PC的流量优先经过r1
[r2-GigabitEthernet0/0/1]vrrp vrid 2 virtual-ip 10.1.1.254
[Internet]ip route-static 10.1.1.0 255.255.0.0 12.1.1.1
[Internet]ip route-static 10.1.1.0 255.255.0.0 23.1.1.2 //在Internet上静态配置两条负载均衡的回包路由
[r1-GigabitEthernet0/0/0]display vrrp brief
3.配置track跟踪端口g0/0/1
[r1-GigabitEthernet0/0/1]vrrp vrid 2 track interface g0/0/0 reduced 30 //跟踪端口g0/0/0，如果端口故障将其优先级降低30，使PC的流量优先经过r2
4.将r1的g0/0/0端口关闭，追踪查看流量，配置成功
