Bob, No problem. On the z800/z900 and an old OSA microcode level all users needed to be in layer 2 or layer 3 mode, but with the z890/z990 you can mix layer 2 and layer 3 usage. Note that you can also mix layer 2 and layer 3 usage within the same z/VM lpar, for VSWITCHes and/or guests, as long as each user gets its own OSA address triplet.
Ronald van der Laan
