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Cisco Bug: CSCuj25197 - ES : Packets received from VPC+ via peer-link forwarded in other VDC

Last Modified

Feb 01, 2017

Products (5)

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

Known Affected Releases


Description (partial)

A Nexus 7000 series switch may forward packet across VDCs when configured for emulated switch in a VDC with F2 modules, with another VDC using M1 modules. 
The leaking packet is received over a VPC+ on the peer, received over the peer-link on an F2 module and picked up by the M1 modules in another VDC.

The Nexus 7000 is equipped with a supervisor 2 or 2E.
The triggers for this issue are :
- After emulated switch is configured, some ports are allocated or de-allocated from the VDC.
- The problem can occur later after a fabricpath topology change (clearing adjacencies, peer-link flap, .)
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Bug Details Include

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  • Status
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  • Known Fixed Releases
  • Related Community Discussions
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