Bug ID 711907: TMM may consume excessive resources when processing UDP traffic

Last Modified: Sep 13, 2023

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

Known Affected Versions:
12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 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,

Opened: Mar 26, 2018

Severity: 2-Critical


Under certain conditions BIG-IP systems may leak memory. Over time, the memory lost might affect performance/scalability as the unit approaches an out-of-memory condition. tmm crash


Over time, this issue might lead to a BIG-IP system out-of-memory condition, which results in a TMM crash and failover event. Traffic disrupted while tmm restarts.


-- UDP profile configured. -- CLIENT_ACCEPTED iRule in use.


You can use either of the following workarounds: -- Run the following command: tmsh modify sys db tmm.sessiondb.table_cmd_timeout_override value true -- Enable 'resassemble-fragments' in the FastL4 profile.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips