In the WLAN network, when HSB backup group is enabled, if the AP has gone online on the primary AC and then the AP information is added offline on the backup AC, the AP status on the backup AC will be displayed as fault. At this time, you need to execute the undo hsb enable command in the HSB backup group view of the standby AC to enable the HSB active and standby backup function, and then execute the hsb enable command to enable the HSB active and standby backup function. At this time, the information on the active AC will be backed up to Standby AC to achieve consistent backup of active and standby information. The AP status on the AC will be displayed as standby.