Bug ID 446402: CGNAT Logging: interleave deterministic NAT states in LTM log

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0

Fixed In:
11.6.0, 11.5.1, 11.5.0 HF1, 11.4.1 HF4

Opened: Jan 27, 2014
Severity: 2-Critical
Related AskF5 Article:


Deterministic NAT state from multiple TMMs can be interleaved in LTM log, making dnatutil unable to use the state information for reverse mapping.


Reverse mapping using interleaved deterministic NAT state log entries in the LTM log could be incorrect.


Configuration change to LSN Pool with deterministic NAT mode while BIGIP is serving connections.


Capture and fix interleaved log entries for deterministic NAT, and use the fixed log entries for reverse mapping.

Fix Information

Deterministic NAT state information will be logged from one TMM when configuration changes.

Behavior Change

deterministic NAT configuration state information will now be logged once per change in configuration.