Bug ID 1286357: Reducing packet loss for BIG-IP instance running on rSeries r2000 / r4000 appliances

Last Modified: Feb 04, 2025

Affected Product(s):
BIG-IP DNS(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, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3

Fixed In:
17.1.1, 15.1.9

Opened: Apr 10, 2023

Severity: 2-Critical

Symptoms

Packet loss occurs when DNS traffic flows through BIG-IP tenant on rSeries r2000 / r4000 appliances. This causes DNS performance to regress.

Impact

Reduction in packet loss.

Conditions

BIG-IP vCMP instance running on rSeries r2000 / r4000 appliances DNS traffic (or other UDP traffic as well) flowing through BIG-IP

Workaround

None (This change is an improvement that alleviates performance regression)

Fix Information

The rx/tx ring buffer sizes of iavf driver are increased.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips