.-MPCLEVEL--=--HPDT-------. >>-+-------------------------+--------------------------------->< '-MCPLEVEL--=--+-HPDT---+-' +-NOHPDT-+ '-QDIO---'
| statements: | TRLE |
| dependencies: | HPR start option, MAXREADS, PACKING, STORAGE |
Specifies the level of MPC capability to be used for the
connection. See z/OS Communications Server: SNA Network Implementation
Guide for information about the different levels
of MPC capability provided by VTAM®.
- MPCLEVEL=HPDT
- Indicates that HPDT MPC is
to be used for the connection. This operand is required for native
ATM connections. Note: For connections to an adjacent APPN node or an Open Systems Adapter port: When MPCLEVEL=HPDT, you must code HPR=RTP in the start list for this VTAM. This restriction does not apply if this MPC connection is only for IP traffic.
- MPCLEVEL=NOHPDT
- Indicates that non-HPDT MPC is to be used for the connection. If MPCLEVEL=NOHPDT is specified and a value is coded for the MAXREADS, PACKING, or STORAGE operand, the values specified for MAXREADS, PACKING, or STORAGE are ignored.
- MPCLEVEL=QDIO
- Indicates that the Queued Direct I/O interface is used for an OSA-Express feature. Control data is transmitted across the one READ and one WRITE device. Normal data is transmitted across a DATAPATH device, where each ULP is assigned its own device number for normal data when the device or interface is started, and a device number for trace data when the OSA-Express network traffic analyzer (OSAENTA) trace is started. When the MPCLEVEL value is QDIO, HPDT MPC is also used for this connection across the control channels. When you code MPCLEVEL=NOHPDT, the PACKING and STORAGE operands are ignored. The MAXREADS value is forced to 2 and should not be coded.