Bug ID 459001: Invalid PVA statistics

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.6.2 HF1

Fixed In:
11.6.0, 11.5.1 HF5

Opened: Apr 25, 2014

Severity: 3-Major

Related Article: K16346


The PVA statistics reported by TMSH can incorrectly report bits and packets processed counts of about 34 billion and 16 million, respectively. This failure is intermittent.


Incorrect statistics. Data flow through the BIG-IP is not impacted.


There are no specific conditions leading to this problem.



Fix Information

PVA statistics for each flow are tracked in hardware and software. The software copy of the hardware flow statistics was not correctly reset when flows were evicted from the PVA hardware and then subsequently reloaded back into the hardware. This eventually resulted in a numeric underflow in the statistics counters that were then displayed with very large positive values. This issue is now fixed.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips