PSF/AIX questions across X.25
ITEM: RTA000099451
Q:
I'd like to have following scenario:
lpr lpd
MVS --SDLC -- PSF/2--Ethernet---Router--X.25---Router--Ethernet--4312
SNA TCPIP TCPIP IPDS
Questions:
1. Could this Configuration work ?
2. Will the Performance over the x.25 64kb line be enough ?
A:
I see no reason why your configuration should not work. Regarding the
line speed, your printer wants a new page every 5 seconds. You can send
6K of data per second over the line. As long as your pages are not too
too complex it should work. But if you have complex (DCF-like) pages
or images, your line speed can be a limitation. (But where is an
alternative?).
Question........:
The customer is very interested in our solution.
An additional requirement is 3270 over TCP/IP.
That's the reason for the new scenario.
MVS --SDLC --RISC/6000--Ethernet---Router--X.25---Router--Eth--4312
PSF/MVS-SNA- PSF/6000 +-- PC
SNA-Server/SNA-Client-Access
Is your answer in this scenario true, too?
A:
The previous responder forwarded your reopened item to me.
I'm not sure if I have sufficient background on your customer's desired
configuration to give you a complete answer. I've had to make some
assumptions, which I hope will be clear in this response.
PSF/AIX can drive TCP/IP-attached IPDS printers. I'm not familiar with
X.25 networks, but as long as you can establish a TCP/IP sockets
connection (which is what PSF/AIX uses to communicate with the printer)
across this topology, then I believe you should be able to support the
printer in this way although this has not been officially tested.
On the other hand if you intend to drive the 4312 as a PCL printer
rather than IPDS), then you can set up the 4312 as a remote printer to
the RS/6000; PSF/AIX will do its work, then requeue the output to the
AIX spooling subsystem for sending to the printer. Again, I include the
caveat that I'm not familiar with X.25 networking, and if the question
is if you can establish AIX remote print or a sockets connection across
this network, the question will need to be redirected to the networking
experts. The performance caveats from the earlier response still apply.
I notice that you have PSF/MVS communicating with PSF/AIX using SNA
and SNA Server/6000. I make the assumption that you mean to use PSF
Direct. If that is the case, PSF/MVS will output IPDS, route it to
the host receiver application on the PSF/AIX system. Then, if the
4312 is running as a TCP/IP-attached IPDS printer, PSF/AIX will
pass the IPDS through to the printer using the sockets connection I
mentioned earlier. Operator control will stay at JES until the job
finishes printing on the 4312. In contrast, if the 4312 is running
as a PCL printer, PSF/MVS will again pass the IPDS to the host receiver
on PSF/AIX. Then PSF/AIX will convert the IPDS to PCL through its
secondary process and requeue the PCL to the AIX spooling subsystem.
At that point, PSF/AIX considers the job complete and notifies JES.
The AIX subsystem will then communicate with the printer using its
usual set up for remote printers.
I'm not sure where your inclusion of SNA Client Access fits in with
the printing. Perhaps that's for your 3270 access, and if so, I'll
defer to the SNA Client Access experts if you have questions in that
area.
I hope this helps.
S e a r c h - k e y w o r d s:
CROSS PSF AIX PSF/6000 PSF/AIX X.25 ETHERNET PRINT MVS direct sna
WWQA: ITEM: RTA000099451 ITEM: RTA000099451
Dated: 06/1998 Category: XPSF6000
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