Bug ID 758437: SYN w/ data disrupts stat collection in Fast L4

Last Modified: Nov 22, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP AVR(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,, 14.1.0,,,,,, 14.1.2,,,,,,,

Fixed In:

Opened: Feb 12, 2019
Severity: 3-Major


Fast L4 analytics reports very large integers for goodput.


Goodput data is unreliable.


BIG-IP receives SYNs with attached data.



Fix Information

Data coupled with the SYN breaks the check for a Fast L4 state change. The connection can still function normally, but statistics collection is reliant on the state change to initialize things properly. The system now ensures the correct state under these conditions, so statistics are measured correctly.

Behavior Change