Bug ID 2449577: TMM core after running tmsh load sys config default

Last Modified: Sep 02, 2026

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

Fixed In:
21.1.0.2, 17.5.1.9, 17.1.3.5

Opened: Aug 04, 2026

Severity: 1-Blocking

Symptoms

TMM getting core

Impact

tmm is restarting

Conditions

When "tmsh load sys config default"

Workaround

NA

Fix Information

When the command "load sys config default" is executed, the VLAN configurations are not removed; however, the underlying trunk configurations are removed and then recreated. This operation results in a stale interface pointer (ifp) within the interface structure (ifc). Since existing VLANs are not deleted during the load system configuration process, the logic has been extended to include the associated trunks as well

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips