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Cisco Bug: CSCvh59195 - ISR4K: QFP crashed due to NAT memory leak

Last Modified

Aug 15, 2019

Products (1)

  • Cisco 3G Wireless WAN

Known Affected Releases

Denali-16.3.1

Description (partial)

Symptom:
ISR4K router may crash after user NAT consumed most exmem memory.   The ucode crash pointing to add more chunk memory.  

Monitor below command for user NAT holding memory increases.  In below example, 65 chunks with 50MB.  

#show platform hardware qfp active infrastructure exmem statistics user | incl NAT
  65           50599632     50630656     NAT

few days later
#show platform hardware qfp active infrastructure exmem statistics user | inc NAT
  72           57949744     57985024     NAT

Conditions:
The trigger is when adding/releasing the IP address on the dialer interface.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
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