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Cisco Bug: CSCvs49263 - Traffic outage when switching 4x25G --> 2x50G --> 4x25G soft-breakout, control plane is fine

Last Modified

Jul 15, 2020

Products (65)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3132Q-V Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 9396PX Switch
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Known Affected Releases

9.3(2.68) 9.3(3)

Description (partial)

This issue seen when
 4x25G --> 2x50G --> 4x25G soft-breakout happens

As long as port is in 25G mode or 50G mode there won't be any problem

Symptom:
PIXMC-SDB would be wrong
Breakout third port LTL will be assigned 2nd port ifidx

Conditions:
only 4x25G --> 2x50G --> 4x25G transition happens this problem will be seen
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Bug Details Include

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