Bug ID 748355: MRF SIP curr_pending_calls statistic can show negative values.

Last Modified: Jul 22, 2019

Bug Tracker

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

Known Affected Versions:
14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 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, 15.0.0

Opened: Oct 31, 2018
Severity: 3-Major

Symptoms

Certain irregular SIP message patterns may produce an erroneous curr_pending_calls value that can drop below zero and underflow.

Impact

SIP curr_pending_calls may show incorrect values.

Conditions

Uncommon message flows like re-transmitted INVITE or OK responses can trigger the issue, which may be brought about at times by lost packets when using UDP.

Workaround

None

Fix Information

None

Behavior Change