D Shared Memory Communications Naming:  The IBM z14 server generation is available as the following machine types and  models: In the remainder of this document,  IBM z14 (z14)  refers to both machine types, unless  otherwise specified. This appendix briefly describes the optional Shared Memory Communications (SMC) function  that is implemented on IBM Z servers as Shared Memory Communications over Remote  Direct Memory Access (SMC-R) and Shared Memory Communications - Direct Memory  Access (SMC-D) of IBM z14, z13, and z13s servers. The following types adapters are available for SMC-R for physical connectivity: Throughout this appendix, we use the terms  10GbE RoCE Express  and  RoCE Express  for  both adapters, except when the adapter specifications differ. This appendix includes the following topics: GLYPH<SM590000> Machine Type 3906 (M/T 3906), Models M01, M02, M03, M04, and M05  further  identified as  IBM z14 Model M0x , or  z14 M0x . GLYPH<SM590000> Machine Type 3907 (M/T 3907), Model ZR1  further identified as  IBM z14 Model ZR1 ,  or  z14 ZR1 . GLYPH<SM590000> 25Gbe RoCE Express2 (FC 0430) GLYPH<SM590000> 10GbE RoCE Express2 (FC 0412) GLYPH<SM590000> 10GbE RoCE Express (FC 0411): This adapter can be carried forward to z14 ZR1 GLYPH<SM590000> D.1, “Overview” on page 426 GLYPH<SM590000> D.2, “Shared Memory Communication over RDMA” on page 426 GLYPH<SM590000> D.3, “Shared Memory Communications - Direct Memory Access” on page 438 425 ' Copyright IBM Corp. 2018. All rights reserved.