A fix is available
APAR status
Closed as program error.
Error description
When largesend is enabled on the SEA and the LPAR clients, turning off largesend on one of the clients created DUP-ACK storm on the switch. This seems to be generated by the adapter hardware when the TX packet is small, but largesend flag set.
Local fix
Turning off largesend on the SEA should avoid this problem.
Problem summary
DUP-ACK storm on the switch
Problem conclusion
Code is modified to use largesend appropriately on the above mentioned scenario
Temporary fix
Comments
APAR Information
APAR number
IV19511
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2012-04-11
Closed date
2012-04-11
Last modified date
2013-02-27
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U851336
UP12/07/16 I 1000
PTF to Fileset Mapping
U851336 devices.pci.14106902.rte 6.1.5.5
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Document Information
Modified date:
27 February 2013