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Cisco Bug: CSCvh66758 - Big buffer exhaustion due to FNF

Last Modified

Aug 09, 2019

Products (1)

  • Cisco IOS

Known Affected Releases

15.2(1)SY4.1

Description (partial)

Symptom:
On a VSS setup, there is a memory exhaustion due to "NF SE export" process in the processor pool
This process is responsible for creating new buffers for sending FNF packets 

The suspect so far, is that the problem is due to a buffer leak:

Big buffers, 1536 bytes (total 12633, permanent 1000, peak 12633 @ 00:00:05):
     65 in free list (64 min, 1000 max allowed)
     64604797 hits, 3876 misses, 0 trims, 11633 created
     
Statistics for the Big pool
Caller pc    : 0x21136748 count:    12717

Conditions:
Flexible netflow on a VSS setup.
Exact condition/trigger is unknown so far

There is a suspect where the "show flow monitor <>" subcommands might cause additional leaks.
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