VTAM® support for switched terminals, dynamic reconfiguration, and primary addresses for independent logical units requires that the LUDRPOOL and PUDRPOOL definition statements be coded at NCP generation. To support these functions, VTAM issues request network address assignment (RNAA) RUs requesting the NCP to assign a physical unit or logical unit address to a resource specified by VTAM. The addresses come from the address pools generated as a result of the LUDRPOOL or PUDRPOOL definition statements. For more information on the LUDRPOOL and PUDRPOOL definition statements, see NCP, SSP, and EP Resource Definition Reference and NCP, SSP, and EP Resource Definition Guide.