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Half-Duplex Attached Devices Trouble Auto-Negotiating and/or Retaining Link Once Link Established

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TitleHalf-Duplex Attached Devices Trouble Auto-Negotiating and/or Retaining Link Once Link Established
Symptoms
  • Switch upgraded from 7.6.2.019 to 7.6.2.217 to address Random Ports On Switch Stop Passing Traffic
  • Legacy devices operating at half-duplex having difficult time establishing link
  • Must change port settings on switch to get device to establish link
  • Some devices require toggling auto-negotiation whereas others that does not resolve and requires speed/duplex toggle to bring link up
  • Once port change done on switch, devices establish link but will intermittently lose link over time
  • Half-duplex devices established link with no intervention and maintained link reliably prior to 7.6.2.217 release
Environment
  • ERS 5900
  • Release 7.6.2.217
Cause
Software defect ERS495900-5439
Resolution
Fixed in 7.7 release
Additional notes
Workaround
  • Downgrade to 7.6.2.019

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