The remaining migration articles assume that WebSphere Application Server Version 5.1 is being installed in an environment where it must coexist with prior levels of WebSphere Application Server. Consider the following items while planning to enable coexistence:
The WebSphere Application Server Version 5.1 copy of BBORTSS5 supports both Version 5.1 and Version 5.0, so put the Version 5.1 into LPA so CTRACE will work for both releases.
Consider these other issues in a migration or coexistence scenario:
A procedure for configuring a Web server for sharing between WebSphere Application Server versions is described in the information center for the base WebSphere Application Server product.