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

Last Modified: Apr 10, 2019

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:
K15437

Symptoms

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

Impact

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

Conditions

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

Workaround

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.