Cisco(config)#access-list 1 permit 192.168.1.0 0.0.0.255
Cisco(config)#access-list 2 permit 192.168.2.0 0.0.0.255
Cisco(config)#ip sla monitor responder //打开思科可sla功能
Cisco(config)#ip sla monitor 1
Cisco(config-sla-monitor)#$rotocol ipicmpEcho 12.1.1.2 source-ipaddr 12.1.1.1
Cisco(config-sla-monitor-echo)#frequency 10
Cisco(config)#ip sla monitor schedule 1 life forever start-time now
Cisco(config)#track 1 rtr 1 reachability
R1#show ip sla monitor configuration //查看SLA的配置
Cisco(config)#route-map rm1 permit 10
Cisco(config-route-map)#match ip address 1
Cisco(config-route-map)#set ip next-hop 12.1.1.2 13.1.1.3 //主备出接口备份
Cisco(config-route-map)#set ip next-hop verify-availability //验证链路的可用性，使用于思科设备，借助思科专用的CDP的邻居表项
Cisco(config-route-map)#set ip next-hop verify-availability 12.1.1.2 10 track 1 //引用SLA配置
Cisco(config)#route-map rm1 permit 20
Cisco(config-route-map)#set interface s1/0
Cisco(config)#int f0/0
Cisco(config-if)#ip policy route-map rm1
