Guest

Preview Tool

Cisco Bug: CSCvu93688 - N3500: Outside NAT packets punted to CPU

Last Modified

Oct 06, 2020

Products (65)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 93600CD-GX Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 3132Q-V Switch
View all products in Bug Search Tool Login Required

Known Affected Releases

9.3(4)

Description (partial)

Symptom:
Outside NAT traffic is punted to the CPU of the NAT router, rate-limited and/or consumed.
This will result in one-way packet loss for NAT flows - (outside -> inside direction)

Conditions:
Nexus 3x00 Series - 9.3(4)
NAT configuration - Outside Static NAT, Static Twice NAT,  or combination of both

This defect is only impacting NAT routers  with ECMP for out-to-in translations 

*Intermittently reproducible with Dynamic Twice NAT (configured with inside source list thus outside configured static)

ECMP NAT is in general not supported on n9k.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.