Activate F5 product registration key
Verify the proper operation of your BIG-IP system
Get up to speed with free self-paced courses
Join the community of 300,000+ technical peers
Advance your career with F5 Certification
Product Manuals and Release notes
You can add BIG-IP® DNS systems to a network in which BIG-IP® Local Traffic Manager™ (LTM®) systems and BIG-IP Link Controller™ systems are already present. This expands your load balancing and traffic management capabilities beyond the local area network. For this implementation to be successful, you must authorize communications between the systems.
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
To authorize communications between BIG-IP® systems, perform the following tasks on the BIG-IP DNS system that you are adding to the network.
Option | Description |
---|---|
Inside Data Center | By default, select probers inside the data center. |
Outside Data Center | Select probers outside the data center. |
Specific Prober Pool | Select one of the Probers from the drop-down list. When you want to
assign a Prober pool at the data center level. Note: Prober pools are not used by the bigip monitor. |
Option | Description |
---|---|
Any Available | By default, select any available prober. |
Inside Data Center | Select probers inside the data center. |
Outside Data Center | Select probers outside the data center. |
None | No fallback probers are selected. Prober fallback is disabled. |
Specific Prober Pool | Select one of the Probers from the drop-down list. When you want to assign a Prober pool at the data center level. |
Option | Description |
---|---|
Inherit From Data Center | By default, a server inherits the prober preference selection assigned to the data center in which the server resides. |
Inside Data Center | A server selects the probers from inside the data center where the server resides. |
Outside Data Center | A server selects the probers from outside the data center where the server resides. |
Specific Prober Pool | Select one of the Prober pools from the drop-down list. When
assigning the Prober pool at the server level. Note: Prober pools are not used by the bigip monitor. |
Option | Description |
---|---|
Inherit From Data Center | By default, a server inherits the prober fallback selection assigned to the data center in which the server resides. |
Any Available | For selecting any available prober. |
Inside Data Center | A server selects probers from inside the data center where the server resides. |
Outside Data Center | A server selects probers from outside the data center where the server resides. |
None | No fallback probers are selected. Prober fallback is disabled. |
Specific Prober Pool | Select one of the Probers from the drop-down list. When you want to assign a Prober pool at the server level. |
Option | Description |
---|---|
All Health Monitors | By default, specifies that all of the selected health monitors must be successful before the server is considered up (available). |
At Least | The minimum number of selected health monitors that must be successful before the server is considered up. |
Require | The minimum number of successful probes required from the total number of probers requested. |
Option | Description |
---|---|
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 DNS system or for a BIG-IP DNS/LTM® combo system when you plan to manually add virtual servers to the system, or if your network uses multiple route domains. |
Enabled | The system uses the discovery feature to automatically add and delete virtual servers. Use this option for a BIG-IP DNS/LTM combo system when you want the BIG-IP DNS system to discover 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 in the configuration. Use this option for a BIG-IP DNS/LTM combo system when you want the BIG-IP DNS system to discover LTM virtual servers. |
Option | Description |
---|---|
Disabled | The system does not use the discovery feature to automatically add links. This is the default value. Use this option for a standalone BIG-IP DNS system or for a BIG-IP DNS/LTM combo system when you plan to manually add links to the system. |
Enabled | The system uses the discovery feature to automatically add and delete links. Use this option for a BIG-IP DNS/LTM combo system when you want BIG-IP DNS to discover links. |
Enabled (No Delete) | The system uses the discovery feature to automatically add links and does not delete any links that already exist in the configuration. Use this option for a BIG-IP DNS/LTM combo system when you want BIG-IP DNS to discover links. |
Option | Description |
---|---|
Inherit From Data Center | By default, a server inherits the prober preference selection assigned to the data center in which the server resides. |
Inside Data Center | A server selects the probers from inside the data center where the server resides. |
Outside Data Center | A server selects the probers from outside the data center where the server resides. |
Specific Prober Pool | Select one of the Prober pools from the drop-down list. When
assigning the Prober pool at the server level. Note: Prober pools are not used by the bigip monitor. |
Option | Description |
---|---|
Inherit From Data Center | By default, a server inherits the prober fallback selection assigned to the data center in which the server resides. |
Any Available | For selecting any available prober. |
Inside Data Center | A server selects probers from inside the data center where the server resides. |
Outside Data Center | A server selects probers from outside the data center where the server resides. |
None | No fallback probers are selected. Prober fallback is disabled. |
Specific Prober Pool | Select one of the Probers from the drop-down list. When you want to assign a Prober pool at the server level. |
Option | Description |
---|---|
All Health Monitors | By default, specifies that all of the selected health monitors must be successful before the server is considered up (available). |
At Least | The minimum number of selected health monitors that must be successful before the server is considered up. |
Require | The minimum number of successful probes required from the total number of probers requested. |
Option | Description |
---|---|
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 DNS system or for a BIG-IP DNS/LTM® combo system when you plan to manually add virtual servers to the system, or if your network uses multiple route domains. |
Enabled | The system uses the discovery feature to automatically add and delete virtual servers. Use this option for a BIG-IP DNS/LTM combo system when you want the BIG-IP DNS system to discover 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 in the configuration. Use this option for a BIG-IP DNS/LTM combo system when you want the BIG-IP DNS system to discover LTM virtual servers. |
Option | Description |
---|---|
Disabled | The system does not use the discovery feature to automatically add links. This is the default value. Use this option for a standalone BIG-IP DNS system or for a BIG-IP DNS/LTM combo system when you plan to manually add links to the system. |
Enabled | The system uses the discovery feature to automatically add and delete links. Use this option for a BIG-IP DNS/LTM combo system when you want BIG-IP DNS to discover links. |
Enabled (No Delete) | The system uses the discovery feature to automatically add links and does not delete any links that already exist in the configuration. Use this option for a BIG-IP DNS/LTM combo system when you want BIG-IP DNS to discover links. |
You now have an implementation in which the BIG-IP® systems can communicate with each other. DNS can now use the other BIG-IP systems when load balancing DNS queries, and can acquire statistics and status information for the virtual servers these systems manage.