Bug ID 450001: Flow control added in SIPP filter can cause the filter to silently switched its XOFF state and never initiate the upper layers

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
11.1.0, 11.2.0, 11.2.1, 11.3.0, 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

Fixed In:
11.6.0, 11.5.1 HF5, 11.4.1 HF4, 11.2.1 HF11

Opened: Feb 24, 2014
Severity: 2-Critical

Symptoms

Flow control added in SIPP filter can cause the filter to silently switch its XOFF state and never initiate the upper layers (in this case MBLB proxy) through HUDEVT_SENT.

Impact

When a server flow incorrectly shares one of the client flow's connections, this could cause a crash.

Conditions

Flow-control enabled in MBLB SIP.

Workaround

None.

Fix Information

Flow control in the SIPP filter no longer blocks flow improperly.

Behavior Change