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Cisco Bug: CSCul53878 - NAT inside to inside or inside to no nat traffic is process switched

Last Modified

Feb 16, 2018

Products (2)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3548 Switch

Known Affected Releases

6.0(2)A1(1c)

Description (partial) 

Symptom:
On a nexus 3500 NAT data plane traffic is process switched in software. This traffic will be subjected to copp and may be dropped due to the copp-s-ip-nat CoPP class.

Conditions:
Dynamic NAT is configured on a nexus 3500. The traffic being punted all matches the configured inside dynamic NAT range.  This issue is only seen when traffic flows from a nat inside interface to another nat inside interface. This issue is not seen when traffic flows between a nat inside and nat outside interface.

This issue can also happen when traffic flows from a nat inside to an interface that is not configured with NAT.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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