Changing the ADNR configuration file
The ADNR MODIFY procname,REFRESH command provides a way to dynamically change the ADNR configuration file. Because the command does not support a file name or dataset specification, changes must be made to the same configuration file that was used when ADNR was started.
Restriction: Make all changes to the ADNR configuration
file dynamically while ADNR is running. Changing the configuration
file without using the MODIFY REFRESH command can create orphaned
resource records in a name server. Orphaned resource records are resource
records that are left in a name server and that ADNR has lost the
ability to manage. The presence of these orphaned resource records
might inaccurately direct client connections to sysplex resources
that are not actually available.
Tip: Before making changes to the ADNR configuration file,
save a backup copy of the original file under a different file name
or dataset name.
You can make changes to the ADNR configuration file while ADNR is stopped, instead of using the MODIFY REFRESH command, if you take precautions to prevent orphaned resource records or you are sure that clients will no longer have their resolvers pointing to a name server with orphaned resource records. Unless you use the MODIFY REFRESH command to make changes, the following types of changes to the ADNR configuration file create orphaned resource records in name servers:
- Removing a dns statement
- Removing a zone keyword from a dns statement
- Changing the domain_suffix keyword value on a dns statement
- Changing the IP address or port of a name server on the dns_id keyword of a dns statement