拓撲：
配置：
VRRP Master:
ip sla monitor 1
type echo protocol ipIcmpEcho 202.1.1.2 source-interface FastEthernet1/0 //追蹤ISP1可達性
frequency 5 //5s發送一次ICMP
ip sla monitor schedule 1 life forever start-time now
!
track 90 rtr 1 //定義一個TRACK
interface FastEthernet0/0
ip address 10.1.1.251 255.255.255.0
ip ospf authentication message-digest
ip ospf authentication-key cisco
duplex auto
speed auto
vrrp 1 ip 10.1.1.254
vrrp 1 timers advertise msec 50
vrrp 1 priority 105
vrrp 1 authentication md5 key-string cisco
vrrp 1 track 90 //調用TRACK
interface FastEthernet1/0
ip address 202.1.1.1 255.255.255.252
router ospf 1
log-adjacency-changes
area 0 authentication message-digest
network 10.1.1.251 0.0.0.0 area 0
ip route 0.0.0.0 0.0.0.0 202.1.1.2
VRRP Backup:
track 90 interface FastEthernet1/0 line-protocol //TRACK出接口的狀态
!
ip address 10.1.1.250 255.255.255.0
vrrp 1 track 90 //調用TRACK
ip address 64.1.1.1 255.255.255.252
network 10.1.1.250 0.0.0.0 area 0
ip route 0.0.0.0 0.0.0.0 64.1.1.2
PC:
ip route 0.0.0.0 0.0.0.0 10.1.1.254
測試：
預設情況下
走的ISP1
PC流量切換到ISP2
注意：PC兩次流量都是走的實體IP位址，并沒有走VRRP IP位址。