The information in this article applies to:
- Microsoft SNA Server for Windows NT, versions 2.0, 2.1, 2.11, 2.11 SP1,
and 3.0
By default there are 64 sessions per LU-LU pairing in SNA Server, as
defined by the QPCSUPP mode. To increase the number of sessions, perform
one or both of the following:
- Create more Local APPC LUs in SNA Server Administrator, and partner them
with the Remote APPC LU, using the QPCSUPP mode. Each LU/LU partnering
supports up to 64 sessions by default.
- Increase the session limits in QPCSUPP mode on the AS/400 and in
the SNA Server Administrator. The maximum for session limits is 512.
This number is imposed by OS/400 (the AS/400 operating system).
To increase these session limits in SNA Server:
a. Choose Remote LU.
b. Choose Partners.
c. Choose Mode.
d. On the QPCSUPP mode, change the Parallel Session Limit to 512 (or the
desired number) and change the Minimum Contention Winner Limit to
half this value.
NOTE: After you change the SNA server configuration, stop SNABase and
restart the SNA server.
To change the session limits on the AS/400, use the CHGMODD(QPCSUPP)
command.
- Maximum sessions (MAXSSN) must match the parallel session limit.
- Maximum conversations (MAXCNV) must match the parallel session limit.
- Locally controlled sessions (LCLCTLSSN) must match the partner
minimum contention winner limit.
NOTE: Mode definition changes on the AS/400 should be dynamic. If the
changes do not occur, turn the AS/400 communications controller off and
back on to make sure the mode definition changes.
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