Bug ID 1325649: POST request with "Expect: 100-Continue" and HTTP::collect + HTTP::release is not being passed to pool member

Last Modified: May 29, 2024

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

Known Affected Versions:
16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 16.1.4,,,, 17.0.0,,, 17.1.0,,,, 17.1.1,,,

Opened: Jul 27, 2023

Severity: 3-Major


After upgrading from a BIG-IP version prior to v16.1.0 to BIG-IP v16.1.0 or later, one specific virtual-server is not working as expected and unable to forward the POST request towards the pool member.


Cannot send POST requests from client to server


1) Upgrade to v16.1.0 or later 2) Send a POST request from client with "Expect: 100-Continue". 3) Attach an irule using http::collect plus http::release to the Virtual Server.



Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips