Bug ID 471292: Deterministic NAT: incorrect mapping on platforms with PDE trunk size greater than 1

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
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, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10

Fixed In:
11.6.0, 11.5.2

Opened: Jul 10, 2014
Severity: 2-Critical


The deterministic NAT (DNAT) utility (dnatutil) might report incorrect reverse mappings for platforms with PDE trunk size greater than 1, due to PDE trunk size value incorrectly logged in the DNAT state information.


Reverse map could provide incorrect results.


Using LSN pool with DNAT mode, and using dnatutil for reverse mapping.


Use the --flags attribute to manually provide the daglib flag attribute, which can include the PDE trunk size value.

Fix Information

DNAT state information with PDE trunk size is correctly logged, dnatutil can correctly reverse map using the logged DNAT state for reverse map.

Behavior Change