No Ingres parameters control or restrict IPv6 in the JDBC Driver or the .NET Data Provider. The DAS (server side of the connection) can be configured as documented in Options for Disabling IPv6 Support. However, there are some Java-specific networking system properties that can by set to control the IPv6 behavior in the JDBC Driver (and other Java applications).

To return IPv6 addresses before IPv4 addresses:

To restrict driver to IPv4 only: