Bug ID 459409: Zero Window timeout on internal VIP cannot be modified

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9

Fixed In:
12.0.0

Opened: Apr 28, 2014
Severity: 3-Major

Symptoms

The Zero Window timeout property of the TCP profile cannot be modified on an internal virtual IP, like the one used by APM hosted content.

Impact

If a large file is hosted on APM client, there is a chance that the TCP window will fill up on a slow connection, and after 20 seconds of zero window, the connection will be reset.

Conditions

Any internal VIP.

Workaround

None.

Fix Information

The TCP configuration for HTTP forwarding internal virtual server can now be modified using these TCP profiles: 1. apm-forwarding-client-tcp for client-side connections and 2. apm-forwarding-server-tcp for server-side connections.

Behavior Change