IV61928: 10G ROCE ADAPTER IN SEA DROPPED LARGESEND PACKETS APPLIES TO AIX 6100-08

APAR status

• Closed as program error.

Error description

• Using a RoCE adapter (10GbE PCIe2 CX2 Network Adapter
  (b315506714106104))as real adapter in a SEA with the
  largesend option enabled will lead to poor throughput,
  because the adapter will drop all largesend packets.
  

Local fix

• disable largesend on the SEA adapter
  

Problem summary

• Using a RoCE adapter (10GbE PCIe2 CX2 Network Adapter
  (b315506714106104))as real adapter in a SEA with the
  largesend option enabled will lead to poor throughput,
  because the adapter will drop all largesend packets.
  

Problem conclusion

• 10G RoCE adapter device driver is fixed to enable device bits
  needed for LSO operations.
  

Temporary fix

Comments

• 6100-08 - use AIX APAR IV61928
  6100-09 - use AIX APAR IV62643
  7100-02 - use AIX APAR IV64280
  7100-03 - use AIX APAR IV62742
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IV62643 IV62742 IV62766 IV64280

Fix information

• Fixed component name

  VIRTUAL I/O SER

• Fixed component ID

  5765G3400

Applicable component levels