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

Chapter 4 101
SNA Node Startup and Shutdown
Establishing PU-SSCP Sessions on the HP 3000
Figure 4-1 PU-SSCP Session Establishment
IBM Remote System HP 3000 (T2.0/T2.1 Node)
Link started up from remote system
SSCP polls for null XID
null XID poll
------>
If HP 3000 is a T2.0
node,
it sends an XID0
If HP 3000 is a T2.1
node,
XID0 or XID3 it sends an XID3
<------
SSCP begins polling link
until positive response
received from HP PU
(SNRM)
------>
Link started up on HP 3000
with SNACONTROL START
(SNRM)
------>
Link driver on PSI sends
unnumbered
(UA) acknowledgement to SRNM
<------
SSCP initiates PU-SSCP
session ACTPU
------>
SNA Transport issues positive
(+ response) response to SSCP
<------
(PU-SSCP session established)