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Copper QSFP+ operation between S-Series and EXOS

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Information

 
TitleCopper QSFP+ operation between S-Series and EXOS
Symptoms
Issues when trying to link S-Series with X690 using 40G copper QSFP+ below
Environment
  • S-Series
  • SKL8008-0810-F8
  • EXOS
  • X690
  • QSFP+ 1M DA Copper - 10312 
  • QSFP+ .5M DA Copper - 10311 
  • QSFP+ 3M DA Copper - 10313 
  • QSFP+ 5M DA Copper - 10323
Cause
Resolution
For the Copper cable types the recommendation is to have auto-negotiation on
This is default for S
It is not default for EXOS 
EXOS 30.2 image has support to enable auto-neg on a 40G port.

 
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