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Ports without autonegotiation are detected as half-duplex

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Information

 
TitlePorts without autonegotiation are detected as half-duplex
Symptoms
  • Port is set to "auto off speed 100 duplex full"
  • Port is detected as half duplex by connected auto negotiating device
Environment
  • EXOS 
  • All platforms 
Cause
Behaviour is expected. When auto negotiation is disabled, the partner device does not know the duplex setting, so defaults to half-duplex.
Resolution
Change both sides to autonegotiate, or fix the speed/duplex on both sides.
Additional notes

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