虚拟地址为192.168.1.254/24，RT1跟RT2虚拟出虚拟网关，其中配置如下：
①RT1的G0/0/1口配置：
interface GigabitEthernet0/0/1 port link-mode route ip address 192.168.1.252 255.255.255.0 vrrp vrid 1 virtual-ip 192.168.1.254 vrrp vrid 1 priority 200 vrrp vrid 1 authentication-mode simple 123
②RT2的G0/0/1口配置：
interface GigabitEthernet0/0/1 port link-mode route ip address 192.168.1.253 255.255.255.0 vrrp vrid 1 virtual-ip 192.168.1.254 vrrp vrid 1 priority 220 vrrp vrid 1 track interface GigabitEthernet0/0/2 reduced 30 vrrp vrid 1 authentication-mode simple 123
从“2”中的配置可以看出，RT2跟踪了上联接口的G0/0/2的状态，现在把RT2的G0/0/2口shutdown，各个vrrp组成员的状态如下：
