We have a small network of 2 servers. We are in the process of updating
our server hardware.

The old servers are running Netware 6.5 sp3, ds We plan to put
in servers running Netware 6.5 sp6, ds Are we going to run into
any problems if we just add the new servers to the current tree with doing
any updates to the old servers? I do not want to do anything to old
servers because they are clustered and any time I have tried to update
them in the past, we only caused great problems.

The new servers will not be clustered.