Check the Infocenter. For V6R1 the Memo is in the following URL:
As per my copy of the V6R1 Memo to Users:
*Starting and ending TCP/IP*
With this release, a new system job named QTCPCTL is started during IPL of
i5/OS. This job coordinates
and processes requests to start or end TCP/IP interfaces, and is persistent
from IPL to power down. A
second system job QTCPWRK is started as part of IPL processing of i5/OS.
This job ends when TCP/IP
is ended and is started when TCP/IP is started.
In previous releases, these functions were performed by the QTCPIP and
QTCPMONITR jobs in the
QSYSWRK subsystem. These two jobs started and ended along with TCP/IP.
Taking i5/OS to restricted
state automatically ends all active TCP/IP interfaces and the TCP/IP
protocol stack (as before). With this
release, ending the QSYSWRK subsystem does not end the active TCP/IP
interfaces. Messages, which
were sent to the job logs of the QTCPIP and QTCPMONITR jobs, are now sent to
the job logs of the
QTCPCTL and QTCPWRK system job logs.
TCP/IP messages, which are sent to the history log, might now appear after
CPF0968, System ended to
With V6R1, the STRTCP command now allows the command to be run while TCP/IP
is active. In this
case, the system performs the processing associated with any STRTCP
parameter specified as *YES. For
example, if TCP/IP is started with the command STRTCP STRSVR(*NO)
STRIP6(*NO), the IPv4 protocol stack is started, but no TCP/IP servers,
interfaces, point-to-point profiles,
or the IPv6 protocol stack are started. Subsequently running the command
STRIFC(*YES) STRTPTPRF(*NO) STRIP6(*YES) starts the IPv6 protocol stack and
all TCP/IP servers and
interfaces configured as AUTOSTART(*YES).
Chapter 2. i5/OS operating system 49
Note: If the TCP/IP protocol stack was not started when TCP/IP was started,
you can start the IPv6 part
of the TCP/IP protocol stack by issuing another STRTCP CL command and
specifying the STRIP6
parameter as (*YES). This action applies to both normal operating mode and
There are other TCP-related notes, but haven't had the time to check them...
IBM Certified Systems Expert — eServer i5 iSeries
On Thu, Jun 16, 2011 at 1:03 PM, Tom Hightower <tomh@xxxxxxxxxxx> wrote:
Is there a link to the memo?
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Luis Rodriguez
Sent: Thursday, June 16, 2011 11:37 AM
To: Midrange Systems Technical Discussion
Subject: Re: Error in starting TCP jobs
IIRC, in V6R1 there were some changes about the stopping and restarting of
TCP/IP interfaces. Check the "Memo to Users" for V6R1...
IBM Certified Systems Expert - eServer i5 iSeries
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