Applies To:
Show Versions
BIG-IP DNS
- 12.1.5, 12.1.4, 12.1.3, 12.1.2, 12.1.1, 12.1.0
Adding a new BIG-IP DNS to a BIG-IP DNS Synchronization Group
Overview: Adding a BIG-IP DNS system to a BIG-IP DNS synchronization group
You can configure BIG-IP® DNS (formerly (GTM)™) systems in collections called BIG-IP DNS synchronization groups. All BIG-IP DNS systems in the same BIG-IP DNS synchronization group have the same rank, exchange heartbeat messages, and share probing responsibility.
Configuration changes to one device in a BIG-IP DNS synchronization group are synchronized incrementally across the devices in the group. That is, only the data that has changed on a BIG-IP DNS 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.

BIG-IP DNS systems in a BIG-IP DNS synchronization group
When you add a BIG-IP® DNS system to a network that contains older BIG-IP DNS systems, the devices can exchange heartbeat messages, even though the BIG-IP software versions are different. However, to add BIG-IP DNS to a configuration synchronization group, you must run the gtm_add script.
Task summary
When adding BIG-IP® DNS to a network that already contains BIG-IP DNS systems in a synchronization group, perform the following tasks.Enabling synchronization on the existing BIG-IP DNS
Decide to which BIG-IP DNS synchronization group you want to add the BIG-IP DNS system. Make certain that at least one previously-configured BIG-IP DNS belongs to that BIG-IP DNS synchronization group.
Creating a data center on the existing BIG-IP DNS
Defining a server on the existing BIG-IP DNS
Running the gtm_add script
Implementation result
The new BIG-IP® DNS system that you added to the network is a part of a BIG-IP DNS synchronization group. Changes you make to any system in the BIG-IP DNS synchronization group are automatically propagated to all other BIG-IP DNS systems in the group.