WAS Coexisting

Coexisting, as it applies to WebSphere Application Server products, is running a new release of a WebSphere Application Server product on the same machine at the same time as you run an earlier release or running two installations of the same release of a WebSphere Application Server product on the same machine at the same time.

You can create an environment in which multiple versions of WebSphere Application Server can run independently on the same system at the same time. A major consideration in coexistence is the avoidance of port conflicts.