Bug ID 744829: Traffic offloaded to ePVA may expire prematurely

Last Modified: Sep 06, 2019

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, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 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, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 15.0.0, 15.0.1

Opened: Sep 21, 2018
Severity: 3-Major

Symptoms

ePVA hardware may not notify software about the traffic stats in time. The delay can be more than 5 seconds on a relatively idle BIG-IP device. So a virtual server with idle timeout lower than 5 seconds might evaluate the traffic as idle with no stats, and drop the connection unexpectedly.

Impact

Traffic gets dropped unexpectedly.

Conditions

-- Virtual servers with idle-timeout lower than 5 set in its profile. -- ePVA-capable hardware: + VIPRION B2100, B2150, B2250, B4300, B4340 blades in C2400 or C2200 chassis + 5000/7000/10000/12000- and i5000/i7000/i10000-series platforms.

Workaround

Set idle-timeout under the virtual server's profile to 10 seconds.

Fix Information

None

Behavior Change