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Cisco Bug: CSCus89236 - Nexus 5600 1gb link unable to transmit frames after link flap

Last Modified

May 24, 2018

Products (10)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5696Q Switch
  • Cisco Nexus 56128P Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

7.0(5)N1(1) 7.0(8)N1(1)

Description (partial)

When a Unifed Port on a Nexus 5600 switch is connected using a 1gigabit SFP, it is unable to pass traffic after a link flap on the remote side.  The link will be shown up but traffic is unable to pass in the transmit direction.  The Nexus will be able to see opposite side as cdp neighbor but opposite side will not see the Nexus.

1. This problem is only seen on unified ports
2. This problem is seen with 1Gig link only with "no negotiate auto" command configured
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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