Bug ID 1495413: TSO on tagged packets is not supported by SPK running on top of Linux Kernel 4.18.0-305.65.1.el8_4.x86_64, uwhen using socket driver

Last Modified: Jun 19, 2025

Affected Product(s):
BIG_IP_NEXT(SPK) SPK(all modules)

Known Affected Versions:
1.8, 1.8.0, 1.8.2

Opened: Jan 25, 2024

Severity: 3-Major

Symptoms

When TCP Segmentation Offload (TSO) is enabled, when using a socket driver, SPK drops tagged packets resulting in a throughput drop. SPK running on top of Linux Kernel version "4.18.0-305.65.1.el8_4.x86_64" does not support TSO for packets from the tagged interface, specifically those with VLAN tags.

Impact

Throughput drop

Conditions

Deploy SPK on top of Linux Kernel version "4.18.0-305.65.1.el8_4.x86_64" using socket driver

Workaround

Disable TCP Segmentation Offload (TSO).

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips