You can configure BIG-IP Global Traffic Manager (GTM) systems in collections called GTM synchronization groups. All BIG-IP GTM systems in the same GTM synchronization group have the same rank, exchange heartbeat messages, and share probing responsibility.
Configuration changes to one device in a GTM synchronization group are synchronized incrementally across the devices in the group. That is, only the data that has changed on a GTM device is synchronized to the other devices in the group. Although incremental synchronization is the default behavior, if an incremental synchronization fails, the system automatically performs a full configuration synchronization.
When you add a BIG-IP (GTM) system to a network that contains older BIG-IP GTM systems, the devices can exchange heartbeat messages, even though the BIG-IP software versions are different. However, to add a GTM to a configuration synchronization group, you must run the gtm_add script.
Decide to which GTM synchronization group you want to add the BIG-IP GTM. Ensure that at least one previously-configured BIG-IP GTM belongs to that GTM synchronization group.
|Disabled||The system does not use the discovery feature to automatically add virtual servers. This is the default value. Use this option for a standalone BIG-IP GTM or for a BIG-IP GTM/LTM combo system when you plan to manually add virtual servers to the system, or if your network utilizes multiple route domains.|
|Enabled||The system uses the discovery feature to automatically add virtual servers. Use this option for a BIG-IP GTM/LTM combo system when you want BIG-IP GTM to discover BIG-IP LTM virtual servers.|
|Enabled (No Delete)||The system uses the discovery feature to automatically add virtual servers and does not delete any virtual servers that already exist. Use this option for a BIG-IP GTM/LTM combo system when you want BIG-IP GTM to discover BIG-IP LTM virtual servers.|