SNA IMF/XL Node Manager's Guide (30293-90010)
34 Chapter4
SNA IMF Session Startup and Shutdown
Starting a Session From the HP 3000 LU
Starting a Session From the HP 3000 LU
An SNA IMF LU-LU session initiated by an LU in the HP 3000 node is
started by sending a character-coded logon message to the IBM host.
The issued logon causes an INITiate-SELF (INIT-SELF) request to be
sent to the SSCP.
In processing the INIT-SELF request, the SSCP determines whether
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 notifies the SSCP that
the session has been established, by sending a SESSion STarted
(SESSST) request. 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 shows an SNA IMF LU-LU session initiated by the HP 3000
LU.