Bug ID 788465: DNS cache idx synced across HA group could cause tmm crash

Last Modified: Sep 13, 2023

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

Known Affected Versions:
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,,,,,,,,, 14.1.3, 15.1.0,,,,,

Fixed In:
16.1.0, 16.0.1, 15.1.1,

Opened: May 30, 2019

Severity: 2-Critical


DNS cache idx conflicts and tmm crash.


The idx conflicts will be observed. If the second DNS cache is of another type and is added to a virtual server, accessing that virtual server might cause a tmm core. Traffic disrupted while tmm restarts.


-- High availability (HA) configuration. -- DNS cache is configured and synced to the peer twice -- A second DNS cache is configured on the peer.


On the BIG-IP system that has the DNS cache idx conflicts, restart tmm: # bigstart restart tmm

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips