You can migrate your product configurations by using the Migration wizard or the command-line migration tools.
When you migrate from WebSphere® Extended Deployment Version 6.0.2 to WebSphere Extended Deployment Version 6.1, you create a mixed cell environment, which is a cell that contains nodes that are operating at both the 6.0.2 product level and the 6.1 product level. To create this environment, you first migrate the deployment manager, and then you migrate each node one at a time, with minimal impact to the applications that are running within the cell.