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Sync Options defines how HA settings are synchronized. It includes two roles, Active controller and Passive controller, and provides two synchronization methods, namely Auto Sync and Sync Now, as shown in the following figure.
Objects: Used to select objects to sync between the two devices, which include the session list. The device checks settings for changes every 10 seconds.
Current Device Role: Specify the device's role in synchronization, which includes Active controller and Passive controller.
Active/Standby: The active device is always the active controller, whereas the standby device is always the passive controller. You cannot switch the roles of the two devices manually.
Active/Standby Mirror Mode: The active device is always the active controller, whereas the standby device is always the passive controller. You cannot switch the roles of the two devices manually.
Active/Active: The device whose Group 0 is set to active is the active controller, whereas the device whose Group 0 is set to standby is the passive controller. You cannot switch the roles of the two devices manually.
Active/Active Layer 2 Mode: You can switch the roles of the two devices manually.
1. Settings of the active controller can be synchronized to the passive controller, and the passive controller cannot modify the synchronized settings.
2. In the active/standby or active/active mode, the device's role depends on the status of Group 0. In the active/active Layer 2 mode, you need to assign a role to the device manually.
3. Manual role switching is only supported in the active/active Layer 2 mode.
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