Before BIG-IP® DNS can operate as an integrated component within your network, communications must be established between BIG-IP DNS and the other BIG-IP systems with which BIG-IP DNS must exchange information. The three scripts described in the table are used to establish these communications in specific instances.
|Script name||When to run|
|gtm_add||To install a new BIG-IP DNS on a network that includes a BIG-IP DNS synchronization group that contains at least one other BIG-IP DNS.|
|big3d_install||To install a new BIG-IP DNS on a network that includes BIG-IP systems running earlier versions of the BIG-IP system software.|
|bigip_add||To install a new BIG-IP DNS on a network that includes BIG-IP systems running the same version of the BIG-IP system software.|
BIG-IP® systems use an XML protocol named iQuery® to communicate with other BIG-IP systems using gzip compression. BIG-IP systems must exchange SSL certificates and be members of the same configuration synchronization group before the systems can share information using iQuery.
The gtmd agent on BIG-IP® DNS uses the iQuery® protocol to communicate with the local big3d agent, and the big3d agents installed on other BIG-IP systems. The gtmd agent monitors both the availability of the BIG-IP systems, and the integrity of the network paths between the systems that host a domain and the local DNS servers that attempt to connect to that domain.
Communications between big3d and gtmd agents using iQuery
The gtm_add script is designed to be run on a BIG-IP® DNS you are installing on your network, when you want to integrate the system into a previously created BIG-IP DNS synchronization group that includes at least one other BIG-IP DNS. The script copies the remote BIG-IP DNS configuration to the local BIG-IP DNS system.
The big3d_install script is designed to be run on a BIG-IP® DNS you are installing on a network that includes BIG-IP systems of earlier versions. The big3d_install script connects to each BIG-IP system on your network, extracts the IP addresses of the devices, and automatically updates the big3d agents on all devices.
The bigip_add script is designed to run on a BIG-IP® DNS you are installing on a network that includes BIG-IP systems of the same version. The bigip_add script exchanges SSL certificates with each of the other BIG-IP systems to authorize communication between the devices.