Bug ID 464148: Deterministic NAT: incorrect mapping on htsplit platforms

Last Modified: Feb 13, 2019

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

Fixed In:
11.6.0, 11.5.2

Opened: May 23, 2014
Severity: 2-Critical
Related AskF5 Article:
K15754

Symptoms

The deterministic NAT (DNAT) utility (dnatutil) might report incorrect reverse mappings for platforms with Intel Hyper-Threading Technology (HT) Technology split plane (htsplit) CPUs, which includes VIPRION and BIG-IP series 4000, 7000, 8000, and 10000 platforms.

Impact

Reverse mapping does not occur.

Conditions

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

Workaround

Use the --flags attribute to manually provide the daglib flag attribute.

Fix Information

The deterministic NAT (DNAT) utility (dnatutil) now reports correct reverse mappings for platforms with Intel Hyper-Threading Technology (HT) Technology split plane (htsplit) CPUs, which includes VIPRION and BIG-IP series 4000, 7000, 8000, and 10000 platforms.

Behavior Change