A fix is available
APAR status
Closed as program error.
Error description
On a VIO server, large_receive setting on the adapter is ON by default but its OFF by default on the Shared Ethernet Adapter (SEA). Normally this results in LRO being off for the system. However when an etherchannel is used instead of a stand alone adapter even if LRO settings are off on SEA it can result in large_receive being performed contrary to documentation.
Local fix
Disable LRO off on the real adapter explicitly. Remove the adapter from the Ethchan config to change this and add back to Ethchan.
Problem summary
When SEA is created over etherchannel, the LRO setting (off by default for SEA) doesn't propogate to the underlying physical adapters.
Problem conclusion
Etherchannel driver should propogate the LRO settings to the underlying adapters.
Temporary fix
Comments
5300-08 - use AIX APAR IZ73827 5300-09 - use AIX APAR IZ73803 5300-10 - use AIX APAR IZ73730 5300-11 - use AIX APAR IZ73642 5300-12 - use AIX APAR IZ72175 6100-01 - use AIX APAR IZ72374 6100-02 - use AIX APAR IZ72383 6100-03 - use AIX APAR IZ65739 6100-05 - use AIX APAR IZ72187 6100-04 - use AIX APAR IZ72536 6100-05 - use AIX APAR IZ72187 6100-06 - use AIX APAR IZ72612 7100-01 - use AIX APAR IV00567
APAR Information
APAR number
IZ73803
Reported component name
AIX 5.3
Reported component ID
5765G0300
Reported release
530
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2010-03-30
Closed date
2010-03-30
Last modified date
2013-04-07
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 5.3
Fixed component ID
5765G0300
Applicable component levels
R530 PSY U830238
UP10/05/18 I 1000
PTF to Fileset Mapping
U830238 devices.common.IBM.ethernet.rte 5.3.9.4
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Document Information
Modified date:
07 April 2013