Bug ID 651901: Removed unnecessary ASSERTs in MPTCP code

Last Modified: Oct 16, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.2, 12.1.3,,,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0,, 11.6.4

Opened: Mar 16, 2017

Severity: 3-Major


There are many scenarios that call ASSERT in the MPTCP code, many of which can be handled without using ASSERT.


If an ASSERT fails, traffic is disrupted while TMM restarts.


A virtual server is configured with a TCP profile with MPTCP enabled.


There is no workaround at this time.

Fix Information

Replaced many ASSERTs with other mitigations that allow TMM to continue running.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips