You can configure BIG-IP Global Traffic Manager (GTM) systems in collections called synchronization groups. All BIG-IP GTM systems in the same synchronization group have the same rank, exchange heartbeat messages, and share probing responsibility.
Configuration synchronization ensures the rapid distribution of BIG-IP Global Traffic Manager (GTM) settings to other BIG-IP systems that belong to the same synchronization group. A synchronization group might contain both BIG-IP GTM and BIG-IP Link Controller systems.
Configuration synchronization occurs in the following manner:
The Network Time Protocol (NTP) servers that BIG-IP GTM references ensure that each system in a synchronization group is referencing the same time when verifying configuration file timestamps.
BIG-IP GTM systems exchange heartbeat messages when different software versions are installed on the systems. However, configuration synchronization cannot occur when different software versions are installed on the systems. Therefore, when you upgrade BIG-IP GTM, the configuration of the upgraded system does not automatically synchronize with the configuration of the systems in the synchronization group that have an older software version.
When adding an additional BIG-IP GTM system to your network, perform the following tasks on a BIG-IP GTM system that is already on your network.
|Disabled||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 links to the system.|
|Enabled||The system uses the discovery feature to add links. Use this option for a BIG-IP GTM/LTM combo system when you want BIG-IP GTM to discover links.|
|Enabled (No Delete)||The system uses the discovery feature and does not delete any links that already exist. Use this option for a BIG-IP GTM/LTM combo system when you want BIG-IP GTM to discover links.|