Bug ID 1325681: VLAN tscookies with fastl4 timestamp preserve and PVA acceleration cause connection problems.

Last Modified: Jun 22, 2024

Affected Product(s):
BIG-IP AFM, Install/Upgrade(all modules)

Known Affected Versions:
15.1.9,, 15.1.10,,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 16.1.4,,,, 17.1.0,,,, 17.1.1,,,

Opened: Jul 27, 2023

Severity: 3-Major

Related Article: K000136894


Some connections might be reset by the client or server when VLAN timestamp cookies are configured.


Unexpected flow RSTs from client/server due to incorrect timestamp echo received from BIG-IP.


-- Flow accelerated in PVA. -- VLAN timestamp cookies configured for one side of the connection. -- Bigproto timestamp preserve option (default). -- Client and server sending timestamps.


Either: - Set fastL4 profile option 'tcp-pva-whento-offload' to 'establish' OR - Disable VLAN timestamp cookies. OR - Change Bigproto timestamp option to rewrite (this disables PVA acceleration in a process).

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips