Bug ID 466875: SNAT automap may select source address that is not attached to egress VLAN/interface

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0,, 11.5.7

Opened: Jun 12, 2014

Severity: 3-Major

Related Article: K15586


Egress packets have a source address that is not associated with the VLAN or interface.


Packets may not be routed properly.


Occurs when the following conditions are met: - Virtual utilizes SNAT automap. - There exists a route matching a self-ip on interface A to a VLAN on interface B.


Use SNAT pool instead of automap.

Fix Information

SNAT Automap now matches self-ip against selected SNAT pool member instead of the pool member route.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips