路由器A的配置如下： Quidway#SHOW RUN Current configuration ! user huawei service－type pp

路由器A的配置如下： Quidway#SHOW RUN Current configuration ! user huawei service-type ppp password 0 quidway ! interface Ethernet0 ip address 1.1.1.1 255.0.0.0 ! interface Serial0 encapsulation ppp ppp authentication chap ppp chap host huawei ip address 2.1.1.1 255.0.0.0 ! interface Serial1 encapsulation ppp ! interface Serial2 flowcontrol normal async mode dedicated encapsulation ppp ! exit ip route 0.0.0.0 0.0.0.0 2.1.1.2 preference 60 end 路由器B的配置如下 Quidway#SHOW RUN Current configuration ! user hw service-type ppp password 0 quidway ! ip address 3.1.1.1 255.0.0.0 ! interface Serial0 clock-select DTECLK1 encapsulation ppp ppp chap host huawei ip address 1.1.1.2 255.0.0.0 ! interface Serial1 encapsulation ppp ! interface Serial2 flowcontrol normal async mode dedicated encapsulation ppp ! exit ip route 0.0.0.0 0.0.0.0 2.1.1.2 preference 60 end 发现两端路由器不能PING同对端以太网端口，下述说法正确的是

A、A验证配置错误 B、B验证配置错误 C、A验证方路由配置错误 D、B被验证方路由配置错误

请帮忙给出正确答案和分析，谢谢！