Step for deleting cache entries
You might want to delete the contents of the cache when an IP address has changed for a given host name or when your cache storage is exhausted.
Procedure
Perform the following step to delete the contents of the cache:
Issue the MODIFY RESOLVER,FLUSH,ALL command to delete all
cache entries. For more information about the MODIFY command for the resolver address space, see z/OS Communications Server: IP System Administrator's Commands.