某数据中心中配备2台核心交换机CoreA和CoreB，并配置VRRP协议实现冗余，网络管理员例行巡查时，在核心交换机CoreA上发现内容为"The state of VRRPChanged form master to other state"的告警日志。经过分析，下列选项中不可能造成该告警的原因是（）
- A.Cbre A和Core B的VRRP优先级发生变化
- B.Core A发生故障
- C.Core B发生故障
- D.Core B从故障中恢复
正确答案及解析
正确答案
解析
交换机A的状态从主交换状态切换成其他状态。
原因1:
主用交换机故障。
原因2:
主用链路故障。
原因3:
主用交换机或备份交换机的VRRP优先级发生变化。
原因4:
主用交换机上VRRP所在的逻辑接口被删除或者是VRRP配置被删除。
原因5:
原主用交换机故障恢复。
原因6:
原主用链路故障恢复。
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