Apparently it's fixed in 1.9. When we were burned vipa made it painless.
-----Original Message----- From: IBM TCP/IP List [mailto:[EMAIL PROTECTED] On Behalf Of Colin Keltie Sent: Friday, July 25, 2008 4:36 AM To: [EMAIL PROTECTED] Subject: Re: [IBMTCP-L] segmentationoffload Like most everybody else on this list, we got very badly burned by segmentation offload last year: one minor change applied on our development LPAR triggered the OSA disconnect and bingo: all service lost, and IPL'ing didn't restore comms. it took us a few days to track down the root cause as segmentation offload (as the feature had been applied by default since we upgraded to z9's), and we were one day away from applying the same PTF to our production environments!! I've been waiting with bated breath to see what IBM would be recommending, but unless I've missed it there's been no new announcements. I would be very wary of enabling segmentation offload matey. Colin "Rabara, Ed" <[EMAIL PROTECTED]> Sent by: IBM TCP/IP List <[EMAIL PROTECTED]> 24/07/2008 18:53 Please respond to IBM TCP/IP List <[EMAIL PROTECTED]> To [EMAIL PROTECTED] cc Subject Re: [IBMTCP-L] segmentationoffload This Washington Systems Center Alert has been around for a while. Does it still apply? Like everyone else that ran into the problem, is the recommendation to run with NoSegmentationOffload still valid? > -----Original Message----- > From: IBM TCP/IP List [mailto:[EMAIL PROTECTED] On Behalf Of John S. > Giltner, Jr. > Sent: Thursday, July 24, 2008 9:47 AM > To: [EMAIL PROTECTED] > Subject: Re: [IBMTCP-L] segmentationoffload > > IBM has problems with segmentation offload and they are still recommending > that you run with it disable. You can loose access to a OSA adapter with > it enabled. Watch for the wrap: > > http://www- > 1.ibm.com/support/docview.wss?rs=852&context=SSSN3L&dc=D600&uid=swg21232 59 > 9&loc=en_US&cs=UTF-8&lang=en&rss=ct852other > > Search on "COMMUNICATIONS SERVER MAINTENANCE" within the above page and > read the part in bold. > > > -----Original Message----- > >From: Matt Dazzo <[EMAIL PROTECTED]> > >Sent: Jul 24, 2008 11:08 AM > >To: [EMAIL PROTECTED] > >Subject: [IBMTCP-L] segmentationoffload > > > >I am applying RSU system maint and there are couple of sysmods that will > be changing the segmentationoffload default from enabled to disabled. When > I display my tcp config I do see that segoffload=yes, but how do I know if > tcp is actually exploiting it? Anyway to tell? > > > >Thanks Matt > > > >Global Configuration Information: > >TcpIpStats: No ECSALimit: 0000000K PoolLimit: 0000000K > >MlsChkTerm: No > >SegOffload: Yes SysplexWLMPoll: 060 > >Sysplex Monitor: > > TimerSecs: 0060 Recovery: No DelayJoin: No AutoRejoin: No > > > >---------------------------------------------------------------------- > >For IBMTCP-L subscribe / signoff / archive access instructions, > >send email to [EMAIL PROTECTED] with the message: INFO IBMTCP-L > > ---------------------------------------------------------------------- > For IBMTCP-L subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO IBMTCP-L ---------------------------------------------------------------------- For IBMTCP-L subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO IBMTCP-L This e-mail is confidential and, if you are not the intended recipient, please return it to us and do not retain or disclose it. 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