Bug ID 760771: FastL4-steered traffic might cause SSL resume handshake delay

Last Modified: Nov 07, 2022

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,

Fixed In:
15.0.0,, 13.1.3

Opened: Mar 07, 2019

Severity: 3-Major


When a FastL4 virtual server steers traffic to another SSL-enabled virtual server, there can be a delay on SSL session resumption because SSL is unable to identify the connection flow. Additionally, it has been observed that if fallback persistence is configured, the BIG-IP system might fail to start the connection serverside.


-- Potential impact to SSL performance. -- Possible connection failure.


-- FastL4 virtual server. -- iRule is used to steer traffic to another virtual server with client SSL enabled. -- Multiple tmm's.


To workaround this issue: -- Disable FastL4. -- Enable OneConnect.

Fix Information

FastL4-steered traffic no longer causes SSL resume handshake delay.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips