SuSE Linux Enterprise Server is the "professional" SuSE distribution. To get support and patches from the manufacturer (now Attachmate, previously Novell) you have to purchase a license.
- SLES 9 SP4: Has EoLed in August 2010
- SLES 10 SP4: Has XEN 3.2 built in (Dom0-Support)
- SLES 11 SP2: Has XEN 4.1 built in, ha-stack has to be licensed separately, KVM also supported