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Cisco Bug: CSCup21009 - N3K: Downstream port-channel in I state following reload

Last Modified

Feb 14, 2018

Products (7)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3016 Switch
  • Cisco Nexus 3064-T Switch
  • Cisco Nexus 3048 Switch
  • Cisco Nexus 3132Q Switch
  • Cisco Nexus 3172 Switch

Known Affected Releases

6.0(2)U3(1)

Description (partial)

Symptom:
After a reload of a vPC device, the nexus switch may bring its physical links up and keep in a locally suspended state while vPC is negotiating.  During this time it does not send out LACP PDUs causing the downstream device to move its interface into a standalone (I) status potentially leading to traffic loss.

Conditions:
This has been observed on Nexus3000 and Nexus5000 running vPC.  Configuring 'delay restore' may exacerbate the issue as the downstream device keeps its link in an (I) state for a longer duration
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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