Once you have created the corresponding stream job files,
you can start up the workstations. To use an SNA NRJE workstation,
you must initiate an LU-LU session between an HP 3000 LU (the secondary
LU) and a host LU (the primary LU). An NRJE LU-LU session is initiated by
the LU in the HP 3000 node, with the MPE command NRJECONTROL START or the NRJE command STARTWS (see Chapter 6 “Commands” of this manual). The
issued command causes an INITiate-SELF (INIT-SELF) request to be
sent to the SSCP.
In processing the INIT-SELF request, the SSCP determines if
the host LU is accepting session-initiation requests. The SSCP then
sends a Control INITiate (CINIT) request to the host LU. The host
LU then sends a BIND request to the HP 3000 LU. The BIND protocols
specified in the request must be accepted by the HP 3000. If the
protocols are acceptable, the HP 3000 LU sends a positive response,
and the LU-LU session is established. The host LU sends a SESSion
STarted (SESSST) request to notify the SSCP that the session has
been established. The host LU sends a Start Data Traffic (SDT) request
to the HP 3000 LU, to allow data requests to be transmitted. Figure 4-1 “SNA NRJE LU-LU Session Initiation” shows how an NRJE LU-LU session is initiated.
Figure 4-1 SNA NRJE LU-LU Session Initiation
