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Cisco Bug: CSCun78718 - N7k 6.2(2) Port-Profile modification removing the entire VDC config-tion

Last Modified

Feb 15, 2018

Products (7)

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

Known Affected Releases


Description (partial)

An incorrect rollback of failed Port-Profile modification might be seen in some very specific cases on N7k devices. As a result of this incorrect PPM rollback, significant part of running configuration might be negated on the device. Reloading the device recovers it from the issue as the device gets re-initialized from its startup configuration.

This is a scalability-related issue. The problem might be seen on heavily over-configured N7k devices with lots of attached FEXes (~1,5K interfaces on the system, ~10K lines in "show run all", ~200 interfaces managed by a single Port-Profile). Under these specific conditions some port-profile operations can take several minutes to be completed, or even just to be rejected.

The problem could be triggered if two different port-profiles are being modified simultaneously from two different management sessions to the N7k device (VDC), and both of the two PPM modifications are failed. In this very specific case two PPM rollback operations could be initiated simultaneously thus breaking the normal PPM rollback operation and resulting in incorrect completion of the PPM rollback operation.
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