R1

interface Ethernet0/0

ip address 192.168.1.2 255.255.255.0

half-duplex

!

interface Ethernet0/1

ip address 172.16.1.1 255.255.255.0

shutdown

half-duplex

standby 1 ip 172.16.1.100

standby 1 timers 5 15 //设置holle包超时时间，5 为五秒无hello包为超时，15为再等待15秒，15秒内无hello包则认为该端口down

standby 1 preempt //开启抢占机制

standby 1 track Ethernet0/1 20 //跟踪E0/1接口，如果该接口down掉，则将优先级减20

R2

interface Ethernet0/0

ip address 10.0.0.2 255.255.255.0

half-duplex

!

interface Ethernet0/1

ip address 172.16.1.2 255.255.255.0

half-duplex

standby 1 ip 172.16.1.100

standby 1 timers 5 15

standby 1 priority 80

standby 1 preempt

standby 1 track Ethernet0/1 20