Bug ID 516292: Incorrect handling of repeated headers

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5

Opened: Apr 03, 2015
Severity: 3-Major
Related AskF5 Article:


If a http/2 request, forwarded to an http/1.1, produces a response that has the same header occurring more than once, the http/2 response would be encoded incorrectly and can't be processed by the http/2 browser.


Browser fail to process responses.


Responses that contain the same header (with possibly different values) more than once.


For the set-cookie header there is no work-around because each cookie requires its own header. For other headers, an iRule could potentially be used to concatenate the values of repeated headers.

Fix Information

The http/2 protocol handling now correctly encodes repeated headers.

Behavior Change