Bug ID 545821: Idle timeout changes to five seconds when using PVA full or Assisted acceleration.

Last Modified: Jul 13, 2024

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

Known Affected Versions:
11.5.3, 11.5.3 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3,,,,, 11.6.4, 11.6.5,,,

Fixed In:
11.5.3 HF2

Opened: Sep 14, 2015

Severity: 3-Major


When FastL4 performs hardware acceleration during the TCP handshake, the FastL4 handshake timeout is not updated to match the profile timeout value after the connection is established.


TCP flows in the established state are dropped if they have more than five seconds of inactivity.


Accelerated, established TCP flows with no traffic for more than five seconds.


Disable embedded Packet Velocity Acceleration (ePVA) acceleration.

Fix Information

Once the TCP connection reaches established state, the idle timeout is set to the value found in the associated profile. By default the profile timeout value is 300 seconds.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips