Bug ID 534804: TMM may core with rate limiting enabled and service-down-action reselect on poolmembers

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.2, 11.5.3, 11.6.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0, 11.6.1, 11.5.4

Opened: Jul 23, 2015

Severity: 2-Critical


TMM may produce a core file when calculating the rate limit in certain circumstances.


Traffic disrupted while tmm restarts.


VIP/pool configuration contains: - Pool configured with + Action On Service Down is set to Reselect - Pool members configured with + Connection Rate Limit is set If all pool members go down, this can trigger the core


Remove rate limit configuration.

Fix Information

TMM no longer cores in certain conditions with rate limiting and service-down-action reselect on poolmembers

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips