Bug ID 450713: FastL4 proxies may drop out-of-order segments after FIN

Last Modified: Feb 13, 2019

Bug Tracker

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

Known Affected Versions:
10.2.3, 10.2.4, 11.0.0, 11.1.0, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4

Fixed In:
11.6.0, 11.5.1 HF5, 11.4.1 HF4, 11.3.0 HF9, 11.2.1 HF11, 10.2.4 HF8

Opened: Feb 28, 2014
Severity: 3-Major
Related AskF5 Article:
K16542

Symptoms

Segments arriving out-of-order after FIN may be dropped when mirroring is enabled.

Impact

Dropped packets must be retransmitted by client and can lead to connection timeouts.

Conditions

FastL4 forwarding proxy with mirroring enabled. The BIG-IP system must receive FIN followed by out-of-order segment.

Workaround

This issue has no workaround.

Fix Information

Out-of-order segments received after FIN will be forwarded as expected.

Behavior Change