Change the IP Address Version

IBM® Cognos® products support two IP address versions: IPv4 and IPv6. IPv4 uses 32-bit IP addresses and IPv6 uses 128-bit IP addresses.

For example:

IPv4: 192.168.0.1:80
IPv6: [2001:0db8:0000:0000:0000:148:57ab]:80

In IBM Cognos Configuration, you can select IPv4 or IPv6 for IBM Cognos communication using the IP Version for Host Name Resolution property. By default IPv4 is employed.

The setting applies only to the computer where it is set. If you select Use IPv4 addresses, all outgoing IBM Cognos connections on that computer are established using IPv4 and the dispatcher accepts only incoming IPv4 connections. If you select Use IPv6 addresses, all outgoing IBM Cognos connections on that computer are established using IPv6 and the dispatcher accepts both incoming IPv4 and IPv6 connections.

IPv4 client computers can communicate with dispatcher computers that are configured for IPv6.

Hostnames specified within a URI are resolved based on the value of the IP Version for Host Name Resolution property. However, if a URI has been specified with a numeric address, it has precedence over this setting and communication takes place using IPv4.

For IBM Cognos Configuration to accept IPv6 addresses in the local URI properties, you must start IBM Cognos Configuration with the -ipv6 option. You can specify the option each time you open IBM Cognos Configuration from the command line.

On Windows, you can set the option permanently by adding the option to the Start menu shortcut.