You create an application server as a member of a configured cluster.
You must create a cluster if you do not already have a configured cluster.
If you are migrating from a previous version of WebSphere Application Server, you can upgrade a portion of the nodes in a cell, while leaving others at the other release level. For a time, you might be managing servers that are at a previous release level and servers that are running at the newer release in the same cell.
When you create a cluster, you specify the node on which the first cluster member resides. In a mixed cell environment, you can use any server from within that node group to create a new cluster member. For example, if the node group to which the cluster belongs consists of a v6.1 node, and a v5.1, you can use a server from either the v5.1 or the v6.1 node to create a new cluster member.
To create a new cluster member, view information about existing cluster members, or manage existing cluster members:
If when you created the new members, you chose to generate unique ports, update the alias list for the virtual host that you plan to use with the new servers.
You can:
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