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

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5

Fixed In:
16.0.0

Opened: Jan 28, 2020
Severity: 3-Major

Symptoms

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.

Impact

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

Conditions

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

Workaround

None

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