Bug ID 452579: Core error possible on FastL4 mirrored connections

Last Modified: Oct 17, 2023

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

Known Affected Versions:
11.6.2 HF1

Fixed In:
11.6.0, 11.5.1 HF5

Opened: Mar 17, 2014

Severity: 2-Critical

Symptoms

On certain FastL4 mirrored connections, it is possible for the active system to experience a core error on new connections.

Impact

Inability to pass traffic on FastL4 mirrored flows.

Conditions

This regression was introduced in engineering hotfixes, including the fix for Bug 450202. (hf4.128.36)

Workaround

Reconfigure the FastL4 VIP as an L2 or L7 vip.

Fix Information

Corrected calculation of server-side MSS.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips