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Cisco Bug: CSCum84466 - N5K:vlan-port number mismatch b/w vPC peers when 2ndary vPC port is down

Last Modified

Jul 28, 2014

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N2(3) 7.0(1)N1(0.50)

Description (partial)

When a vPC port on secondary vPC peer is down, the vlan-port number calculation between vPC peers becomes out of sync.
However this issue doesn't happen when a vPC port on primary vPC peer is down.

+---------------+           +---------------+
  |   Primary    | ==== | Secondary | 
  +---------------+           +---------------+
               \                    /
     vPC ->    \              X  <--- down
                     \         /
                    [ Switch ]
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