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Essential Configuration Tasks
3-DNS
®
Administrator Guide 5 - 15
4. Save and close the file.
5. Commit the changes to the configuration by typing:
3ndc reload
Overview of auto-configuration
The 3-DNS Controller automatically retrieves configuration details from
BIG-IP systems, hosts, and other 3-DNS Controllers that you add to the
3-DNS configuration. This process is known as auto-configuration.
Auto-configuration queries BIG-IP systems for their configuration
information, including self IP addresses and virtual servers.
Auto-configuration can also gather configuration information for host
systems that have SNMP enabled. Using auto-configuration eliminates the
repetitive tasks of entering configuration information both on the BIG-IP
systems and hosts, and on the 3-DNS Controller, thus dramatically reducing
administrative overhead.
Auto-configuration continually monitors the configurations for changes.
When you add or remove an object from a BIG-IP system, 3-DNS
Controller, or host, the change displays almost immediately in the 3-DNS
configuration. The 3-DNS Controller also synchronizes the changes among
the sync group members.
Once the 3-DNS Controller has retrieved the initial configuration, you
modify the auto-configuration settings for each server type using the
Configuration utility. Auto-configuration has three settings:
◆ ON
When the Discovery setting is set to ON, the 3-DNS Controller polls the
BIG-IP systems and host systems in the network every 30 seconds to
update the configuration information for those systems. Any changes,
additions, or deletions are then made to the controller's configuration.
◆ ON/NO DELETE
When the Discovery setting is set to ON/NO DELETE, the 3-DNS
Controller polls the BIG-IP system and host systems in the network
every 30 seconds to update the configuration information for those
systems. Any changes or additions are then made to the controller's
configuration. Any deletions in the configuration are ignored. This
setting is helpful if you want to take systems in and out of service
without modifying the 3-DNS configuration.
◆ OFF
When the Discovery setting is set to OFF, the 3-DNS Controller does
not collect any configuration information from the BIG-IP system and