IBM 3270 Manual page 282

{
.
~'
I
l ;
'"-/
( i
~
Appendix L. Alert Function Customizing Information
(Sequence Number 220)
Alert is an SNA-only function and requires Configuration Support Level C
on 3274 Models IA, 31A, lC, 31C, and 51C.
The SSCP-PU session is used to send alert data to the host. The alert
information flows through the Network Communication Control Facility
(NCCF) to the Network Problem Determination Application (NPDA)
program. NPDA maintains a data base of alert information based on filters
currently in effect for devices throughout the network and allows users to
perform problem determination and failure isolation.
The 3274 will attempt to send alert data for all errors that have not affected
the integrity of the host adapter, the 3274 processor, control storage, or the
control program itself. The 3274 sends alert data based on the NNN error
codes generated by the 3274 control unit and attached devices, and the
NPDA determines which alert data has significance.
NPDA Version 3, Release 1, is required at the host for use of the alert
function.
Operator-Generated Alert Message
Among the possible responses to customizing question 220 are those
indicating that operator-generated alert message capability is wanted. An
operator-generated alert message is a skeleton message, called up by an
operator and filled in with installation-specified information. To properly
process an operator-generated alert message, the Network Problem
Determination Application at the host must have been set up to receive the
message. See the 327 4 Description and Programmer's Guide for the details
of sending an operator-generated alert message.
Appendix L. Alert Function Customizing Information (Sequence Number 220)
L-1