RM/4/IPV4_DEFT_RT_CHG
日志信息
RM/4/IPV4_DEFT_RT_CHG:IPV4 default Route is changed. (ChangeType=[STRING], InstanceId=[USHORT], Protocol=[STRING], ExitIf=[STRING], Nexthop=[STRING], Neighbour=[STRING], Preference=[ULONG], Label=[STRING], Metric=[ULONG])