track

1，R2(config-if)#standby 1 track fastEthernet 0/0 ? 

     <1-255>  Decrement value

 

2，R2(config)#track 1 interface f0/0 ?

     ip             IP parameters

     line-protocol  Track interface line-protocol

 

3，R2(config)#track 1 ip route 100.100.100.0 255.255.255.0 reachability

   R2(config-if)#standby 1 track 1 ?

     decrement Priority decrement

     shutdown  Shutdown group

     <cr>

 

4，R2(config)#ip sla 1

   R2(config-ip-sla)#icmp-echo 100.100.100.100

   R2(config-ip-sla-echo)#timeout 2000

   R2(config-ip-sla-echo)#frequency 2 

   R2(config)#ip sla schedule 1 start-time now life forever

   R2(config)#track 1rtr 1

   R2(config-if)#standby 1 track 1 ?

     decrement Priority decrement

     shutdown  Shutdown group

     <cr>