27Use undo cfd ais level to restore the default.By default, no AIS frame transmission level is configured for a service instance.If no AIS frame transmission level is configured for a service instance, the MEPs in the service instancecannot send AIS frames.Regardless of the value of the level-value argument, the undo cfd ais level command restores the AISframe transmission level to an invalid value.Examples# Configure the AIS frame transmission level as 3 in service instance 1. system-view[Sysname] cfd ais level 3 service-instance 1cfd ais periodSyntaxcfd ais period period-value service-instance instance-idundo cfd ais period period-value service-instance instance-idViewSystem viewDefault level2: System levelParametersperiod period-value: Specifies the AIS frame transmission period in the range of 1 to 60 seconds.service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.DescriptionUse cfd ais period to configure the AIS frame transmission period in the specified service instance.Use undo cfd ais period to restore the default.By default, the AIS frame transmission period is 1 second in all service instances.Regardless of the value of the period-value argument, the undo cfd ais period command restores the AISframe transmission period to 1 second.Examples# Configure the AIS frame transmission period as 60 seconds in service instance 1. system-view[Sysname] cfd ais period 60 service-instance 1cfd cc enableSyntaxcfd cc service-instance instance-id mep mep-id enableundo cfd cc service-instance instance-id mep mep-id enable
