Hi Guillermo,
Let's not start with SLES 11 for SAP upgrade (sorry, I'm not good at that), currently, SLES 11 for SAP SP3 is supported to run HANA SPS 12.
2302188 - SAP HANA SPS 12 Database Revision 120
2323817 - SAP HANA SPS 12 Database Revision 121
2343165 - SAP HANA SPS 12 Database Revision 122
On SUSE Linux SAP HANA SPS 11 Database Revision 120 requires as minimum Operating System SLES 11 SP3.
Please see further information in the SAP HANA Product Availability Matrix - SAP HANA PAM.
Regards,
Ning