Bug ID 841953: A tunnel can be expired when going offline, causing tmm crash

Last Modified: Sep 13, 2023

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

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,

Fixed In:

Opened: Oct 22, 2019

Severity: 2-Critical


When the system transitions from active or next active (standby), e.g., to offline, the internal flow of a tunnel can be expired. If the device returns to active or standby, and if the tunnel is modified, a double flow removal can cause a tmm crash.


The tmm process restarts. Traffic disrupted while tmm restarts.


-- System transitions from active or next active. -- Tunnel is modified. -- Device returns to active or next active mode.



Fix Information

The tmm process no longer crashes under these conditions.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips