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Cisco Bug: CSCuw51522 - Mac learnt on ES ID for host vpc+ port operating in individual mode

Last Modified

Feb 13, 2018

Products (9)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 2-Slot Switch

Known Affected Releases

6.2(10) 6.2(14) 7.2(0)D1(1)

Description (partial)

On a pair of nexus 7000 series switches configured for fabricpath vpc+, the mac address for an host vpc+ operating in individual mode may point to an incorrect interface on the non-parent nexus 7000, either pointing to the local vpc+ leg that is down, or to the fabricpath address for the emulated switch (ES ID.1.65535). Traffic destined for devices behind the host vpc+ ingressing the non-parent nexus 7000 will not reach its destination.

- This is seen in a host vpc+ configuration, a port-channel configured for vpc made of HIF interfaces residing on seperate FEXes, each connected to a single parent nexus 7000
- The port is running in standalone mode allowed by the configuration of no lacp suspend-individual on the port-channel and the absence of lacp configuration on the attached system.
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