Description: This variable represents the desired state of path rollback. Path rollback is defined as the automatic testing and reactivation of higher priority paths. It should be noted that in order to test higher priority paths, the currently enabled path will be interrupted. Setting this variable to 'enabled' will cause rollback testing to occur every repeaterRedundancyGroupRollbackInterval number of milliseconds. Setting this variable to 'disabled' will force the group to remain on lower priority paths, until they themselves fail.