SNA Link/iX Node Managers Guide (30291-90009)

102 Chapter4
SNA Node Startup and Shutdown
Establishing LU-SSCP Sessions on the HP 3000
Establishing LU-SSCP Sessions on the HP 3000
For a dependent LU on the HP 3000 to communicate with another
dependent LU, it must first have a session with the SSCP on the host
system. Each LU-SSCP session is managed by SNA Transport. Figure
4-2 shows LU-SSCP session establishment with SNA Transport acting
as the LU service manager. The SSCP checks the configuration on the
host for the LUs defined for the HP 3000 node. The SSCP will attempt
to activate each defined LU by sending an ACTivate LU (ACTLU)
request. (An independent LU does not need a corresponding LU-SSCP
session to help in establishing an LU-LU session, so the sequence below
does not apply for an independent LU.)
Figure 4-2 LU-SSCP Session Establishment
Once an LU-SSCP session is established, a dependent LU-LU session
can be initiated. The “Startup and Shutdown” chapter in the Node
Manager’s Guide for each SNA service contains an explanation of how
LU-LU sessions are established and terminated for that service.
IBM Host HP 3000 (T2.0 Node)
For every LU configured on
host, SSCP sends
ACTivate LU request ACTLU
------>
SNA Transport checks configurati
on
file for LUs; sends positive
responses only for LUs
found
in configuration file
(+ response)
<------
(LU-SSCP session established)