Bug ID 739349: LRO segments might be erroneously VLAN-tagged.

Last Modified: May 29, 2024

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

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.1.0, 14.1.0.1

Fixed In:
15.0.0, 14.1.0.2, 14.0.1.1, 13.1.1.4

Opened: Aug 06, 2018

Severity: 3-Major

Symptoms

Segments being processed for large receive offload (LRO) (the action the system performs to aggregate multiple incoming packets within a buffer before passing them up) might be erroneously VLAN-tagged when LRO is enabled.

Impact

Egress traffic might sometimes be tagged.

Conditions

-- TCP LRO enabled. -- Egress VLAN untagged.

Workaround

Disable TCP LRO. To enable or disable LRO functionality, you can use the following command syntax: tmsh modify sys db tm.tcplargereceiveoffload value <enable | disable>

Fix Information

The system now ensures that fragment packet flags are correctly set.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips