Bug ID 873641: Re-offloading of TCP flows to hardware does not work

Last Modified: May 29, 2024

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

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4

Fixed In:

Opened: Jan 28, 2020

Severity: 3-Major


Once Hardware evicts the EPVA TCP flows due to Idle timeout, tmm does not reinsert the flows back when it receives a packet belonging to that flow.


Performance can be impacted. Hardware acceleration will be disabled for the flows once the flow is removed from hardware due to Idle timeout.


This occurs when the TCP connection is kept idle for ~20 seconds.



Fix Information

Fix will re-offload the flows to HW once SW starts receiving packets due to HW eviction of flows by Idle timeout.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips