Bug ID 2144497: Mellanox driver timeouts and packet drops on Azure instances with high NIC count

Last Modified: Dec 11, 2025

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

Known Affected Versions:
17.1.3

Opened: Nov 06, 2025

Severity: 1-Blocking

Symptoms

On Azure instances with high interface count (6 or more) Mellanox linux kernel driver mlx5_core may fail to initialize the interface or attach it very slow. Another symptom of this problem: packets drops because of timeouts in Mellanox device queue processing. mlx_core will report multiple errors in the kernel logs (run "dmesg | grep mlx5_core" to display it).

Impact

- Azure instance starting time may be significant - SSH access may be unavailable - Packets drops on dataplane Mellanox interfaces

Conditions

- BIG-IP VE instance deployed in Azure with 6 or more interfaces - Accelerated networking is enabled

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips