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MA40642 - LIC-COMM-TCPIP-UNPRED 576X CARD HANG

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 APAR (Authorized Program Analysis Report)

Abstract

LIC-COMM-TCPIP-UNPRED 576X CARD HANG

Error Description

576X card hang under heavy load. Seems to occur when MF50512 is
applied, and 576X card is attached to 5873 or 5803 expansion    
unit. The problem does not occur when MF50512 is applied, and  
the 576X card is attached to a 78C0.                            
                                                               
Additional information about this problem:                      
After further analysis, the problem is NOT related              
to a specific expansion unit or how the 576X is                
attached to the System i.                                      

Problem Summary

576X card hang under heavy load.  Seems to occur when MF50512 is
applied, and 576X card is attached to 5873 or 5803 expansion    
unit.  The problem does not occur if MF50512 is not applied, nor
when the 576X card is attached to a 78C0.                      

Problem Conclusion

Licensed internal code has been changed to prevent the 5767 and
5768 Ethernet ports from hanging when sending outgoing TCP      
frames that use large send offload.                            

Temporary Fix

Comments

Circumvention


REPINNED RP11/04/11 'added additional information'              

PTFs Available

R610 MF52880 PTF Cover Letter   1256
R611 MF52713 PTF Cover Letter   1256
R710 MF52714 PTF Cover Letter   1270

Affected Modules

         
         

Affected Publications

Summary Information

Status............................................ CLOSED PER
HIPER........................................... No
Component.................................. 9400DG3CM
Failing Module.......................... RCHMGR
Reported Release................... R611
Duplicate Of..............................




System i Support

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Document Information

Modified date:
15 October 2011