Bug ID 778501: LB_FAILED does not fire on failure of HTTP/2 server connection establishment

Last Modified: Apr 21, 2022

Bug Tracker

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 16.0.0,, 16.0.1,,, 16.1.0, 16.1.1, 16.1.2,,

Opened: May 01, 2019
Severity: 3-Major


When the server connection fails to be established due to server being down or actively rejecting the connection, LB_FAILED should fire and allow a new destination to be selected via iRule.


Selection of a new destination via LB_FAILED is not possible, thus the client connection will be aborted.


- iRule with LB_FAILED event - server connection establishment fails


No workaround available.

Fix Information


Behavior Change