Bug ID 539809: Debug header may show misleading information when Symmetric deployment is configured

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,

Opened: Aug 13, 2015
Severity: 4-Minor


X-WA-Info header shows that a response was served from a remote BIG-IP while it was served from the central BIG-IP.


Information is misleading and may cause confusion in interpretation of http request/response flow. It requires to match the debug header to BIG-IP configuration to extract correct information. If the traffic capture is separated from the configuration snapshot, it may increase a chance of a mistake during analysis.


BIG-IP has to be configured as a central device in AAM Symmetric Deployment, a policy node allows caching of a compressed response. After the response is cached, X-WA-Info header shows that the response was served from a remote BIG-IP for the consequent requests.


While this information is misleading, it still contains useful information which can be extracted and confirmed with a configuration snapshot.

Fix Information


Behavior Change