28CS for z/OS V1R9 TCP/IP Implementation Volume 2: Standard Applications
Stack affinity issues
When TN3270 runs as its own procedure, stack association depends on whether the
TCPIPJOBNAME statement in the TELNETGLOBALS block is used. Even in an INET
environment where only a single TCP/IP stack can run, TCPIPJOBNAME must be specified
for TN3270 to be associated with that stack for some functions.
TN3270 connections automatically associate with the active stack, but the functions listed
here do not work if TCPIPJOBNAME is not explicitly specified:
TN3270 SNMP subagent activation requires specification of a stack name to register with
the agent. ...
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