If you have an existing cluster based on SUSE® Linux Enterprise Server 10, you can update your cluster to run with the High Availability Extension on SUSE Linux Enterprise Server 11 or 11 SP1.
For migrating from SUSE Linux Enterprise Server 10 to SUSE Linux Enterprise Server 11 or 11 SP1, all cluster nodes must be offline and the cluster must be migrated as a whole—mixed clusters running on SUSE Linux Enterprise Server 10/SUSE Linux Enterprise Server 11 are not supported.