IP version considerations for cells

WebSphere Application Server has support for Internet Protocol Version 4 (IPv4) and Internet Protocol Version 6 (IPv6). However, on the OS/400 platform, WebSphere Application Server V6 only supports IPv4.

When defining a node, specify the host name as a string or as a 32-bit numerical address.

Specifying host names

When you create a new profile, you may optionally specify the host name for the profile using the -hostName parameter. If not specified, the host name for the profile defaults to the fully qualified host name for the iSeries server. If you choose to use the -hostName parameter and wish to specify the IP address for your iSeries server, specify the valid 32-bit numerical address.

Multicast configuration

WebSphere Application Server uses multicast broadcasting at the node level to allow a node agent to discover the managed processes in the node. IPv4 and IPv6 addresses are not compatible. Therefore, to allow a WebSphere Application Server node installation to run out-of-the-box, both IPv4 and IPv6 multicast addresses are initially defined in the node agent configuration, and when a node agent starts, both addresses will be tried in sequence. It is a good idea to delete NODE_IPV6_MULTICAST_DISCOVERY_ADDRESS after installation, since by by limiting multicast discovery to the known protocol, the node agent runs more efficiently.

To delete the IPv6 multicast port using the Administrative Console, perform these steps:

1. Click System Administration --> Node Agents.
2. Select the node agent.
3. On the next panel, under Additional Properties, select Ports. The next panel shows a list of existing ports.
4. Select NODE_IPV6_MULTICAST_DISCOVERY_ADDRESS (to delete IPv6).
5. Click Delete.