Bug ID 452283: An MPTCP connection that receives an MP_FASTCLOSE might not clean up its flows

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3

Fixed In:
14.0.0, 13.1.0.4, 12.1.3.4, 11.6.3.3

Opened: Mar 13, 2014

Severity: 2-Critical

Symptoms

An MPTCP connection that never expires can be seen using the command "tmsh show sys conn". Its idle time periodically resets to 0.

Impact

A connection remains that never expires; its idle time periodically resets to 0.

Conditions

A virtual server is configured with a TCP profile with "Multipath TCP" enabled. BIG-IP receives an MP_FASTCLOSE while the BIG-IP is advertising a zero window.

Workaround

There is no workaround at this time.

Fix Information

Fixed MP_FASTCLOSE handling.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips