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APAR NUMBER:  PJ28837                           
PRODUCT:  TPF4  
FUNCTIONAL AREA:  TCP/IP NATIVE STACK  
SHIPPED IN PUT:    
   

ABSTRACT:  
The OSA gateway failure detection processing can erroneously mark  
gateways as failed when TPF is cycling to 1052 state or is in input  
list shutdown.  
   
APAR CONTENTS:  
FEATURE   TYPE                STATUS    NAME                                
Base      Copy                Changed   source/cp/base/ctss40.cpy  
   
PREREQUISITE APARS:  To be applied in order listed.  
Base      Copy                Changed   source/cp/base/ctss40.cpy  
 PJ26683(11)  PJ27333(13)  PJ27451(14)  PJ27932(15)  PJ28213(16)  
 PJ28344(16)  PJ28578(17)  PJ28584(17)  PJ28851(17)  
   

COMMENTS:  
OSA-Express support (APAR PJ27333) added processing to determine if an  
OSA gateway (external router) has failed. This processing includes  
issuing PING messages to the gateway if a certain amount of time has  
elapsed without receiving any data through that gateway. However, if  
the system is in 1052 state or is in input list shutdown, no messages  
can be received from the network because polling of the network is  
stopped. Therefore, TPF could mark some gateways as having failed when,  
in fact, the gateway is active.  
   

SOLUTION:  
Segment CTSS (IP scan processing) has been updated to check if TPF is  
in or cycling to 1052 state or is in input list shutdown and, if so, to  
stop all OSA gateway failure detection timers.  
   
   
DEPENDENCIES  
   

SEGMENTS TO BE ASSEMBLED OR COMPILED:  
CCTCP3  
   

SEGMENTS TO BE LINK EDITED:  
cps040.exe  
   
COREQS:  
None.  
   

MIGRATION CONSIDERATIONS:  
None.  
   
DOWNLOAD INSTRUCTIONS:  
http://www.ibm.com/software/htp/tpf/pages/maint.htm
   
-- END APAR PJ28837 
       



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