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

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2

Fixed In:
15.0.0, 14.1.2.3, 13.1.3

Opened: Mar 07, 2019
Severity: 3-Major

Symptoms

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.

Impact

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

Conditions

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

Workaround

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

Fix Information

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

Behavior Change