Does your sandbox share OSAs with production lpars?   When we encountered 
the problem with offload, every lpar sharing the OSA was impacted.


Earl



"Chase, John" <[EMAIL PROTECTED]> 
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06/06/2008 11:18 AM
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Re: TCPIP Segmentation Offload






> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of Brian Peterson
> 
> This morning, I checked the Exception Letters for our z9 and 
> z10 processors. 
> Both Exception Letters are dated May 28, 2008, and both still 
> say that Segmentation Offload needs to be disabled.
> 
> I am not saying that IBM hasn't fixed the problem - I hope 
> they have.  But, the Exception Letters still say the problem 
> is NOT fixed.

Interesting....  They're dated three days LATER than the date we
installed the latest ucode (that was supposed to fix the problem).

We enabled SEGMENTATIONOFFLOAD on the sandbox (z/OS 1.9) yesterday, but
there's very little TCPIP load on the sandbox (still doing IVP of 1.9,
and post-installation "cleanup").  Maybe we can cobble up something that
should "stress" it to the breaking point (maybe FTP-ing some SMF offload
datasets or sysdumps?).

Meanwhile, we'll leave it disabled on the other LPARs until we hear
something more reassuring (or determine that we can't "break" it on the
sandbox).

    -jc-

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