Bug ID 777937: AWS ENA: packet drops due to bad checksum

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 15.0.0

Fixed In:
15.1.0, 15.0.1, 14.1.0.6

Opened: Apr 29, 2019
Severity: 1-Blocking

Symptoms

-- Lower throughput and tps. -- High availability (HA) heartbeat is getting dropped, resulting in an active-active configuration.

Impact

Performance degradation and invalid HA configuration.

Conditions

AWS Elastic Network Adapter (ENA) NIC is in use.

Workaround

On the BIG-IP system, turn off checksum offloading in on TX as follows: modify sys db tm.tcpudptxchecksum value Software-only Important: This workaround negatively affects NICs other than ENA. Therefore, the workaround is recommended exclusively when ENA is the only dataplane NICs in use in the BIG-IP system.

Fix Information

AWS ENA: no packet drops due to bad checksum.

Behavior Change