Bug ID 455376: Some response messages are dropped by LTM

Last Modified: Apr 28, 2025

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

Known Affected Versions:
10.2.4, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11

Fixed In:
11.6.0, 11.5.2, 11.5.0 HF4, 11.4.1 HF6

Opened: Apr 03, 2014

Severity: 1-Blocking

Related Article: K15747

Symptoms

Some Diameter response messages are dropped by LTM.

Impact

Some response messages get dropped by LTM. The LTM may retransmit the request messages.

Conditions

This occurs when Tcl has parked the request message, typically in an iRule.

Workaround

Remove the Tcl parking iRule, if possible. Tcl parking events: table, after, persist, session if it is possible.

Fix Information

Parked Diameter response messages are no longer dropped, nor are the requests retransmitted.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips