Re: SDLC, 2793 and IOP-less mode -- MIDRANGE-L

Thanks Marty.

Yes, I am pretty familiar with the fact the newer comms are not SDLCready. In fact, I thought that you couldn't even use SDLC protocols atall with the newer comms. However, the IBM tech support bulletin andyour own comments indicate that by "moving the card to an IOP" I mightfix the problem. I am not "hardware-challenged" but I am also not allthat familiar with moving stuff around in the system.So really the question is: IF I want to move the comm to be under anIOP, what do I look for and how do I do this (or what document do I lookat that will describe it)?

Folks who live and breathe in the IOP/IOA (EI-EI-OH!) hardware worldmake think that the fix is obvious and easy to do. Us folks who maystuff memory and hard disks in a box but basically twiddle bits for aliving may find it a bit daunting.

Just looking for a pointer or two.

Pete

Urbanek, Marty wrote:

Pete,

The newer comm cards are very sync-unfriendly. I believe they're saying that if you move 
the card under an IOP, thus restoring port 1 functionality, port 1 would become a 
sync-capable RS-232 port to which you would still have to attach an external synchronous 
modem in order to run SDLC. However I'm kind of assuming that "the functionality of 
port 1" includes synchronous comm protocols, since the paragraph you quoted didn't 
really say that.

-Marty

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date: Wed, 19 Jul 2006 09:59:11 -0600
from: Pete Helgren <Pete@xxxxxxxxxx>
subject: SDLC, 2793 and IOP-less mode
I am getting a error when I try to vary on an SDLC line on a brand new520 at V5R3M0.. Doing some research I came across what I think is adirect hit on the problem but I don't understand the resolution. Couldone of you hardware gurus chime in?
The description of the proposed resolution is from an IBM support document:
The 2793 2-port WAN adapter card (IOA) at Releases V5R3M5 and V5R4M0supports only a PPP connection for ECS or Service Agent when operatingin an IOP-less configuration. This is supported only over port 0 whichis the internal modem port of the card. In IOP-less mode, port 1(external RS-232 port) is non-functional. Moving the IOA to a positionunder a real IOP restores the functionality of port 1.
It's the "Moving the IOA to a position under a real IOP restores thefunctionality of port 1." Sounds simple enough (right?)....but howwould you go about doing this?
Thanks,

Pete Helgren