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Cisco Bug: CSCup69347 - Traffic loss when bringing up pre-existing vPC member port

Last Modified

Feb 03, 2017

Products (9)

  • Cisco Nexus 6000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5672UP Switch
  • Cisco Nexus 56128P Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N2(2) 6.0(2)N2(3) 7.0(2)N1(1)

Description (partial)

When bringing up the ethernet link of a pre-existing vPC port-channel towards 
the vPC primary device while the peer-link is down, traffic arriving on this 
port will be dropped.

This issue occurs when the following sequence occurs for a vPC connected 

1)  The link to the vPC primary is shutdown/unplugged.

2)  The peer-link is shutdown/unplugged

3)  The link to the vPC primary comes back up.
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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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