Bug ID 435959: ARP packet leak, high tmm memory usage, traffic outage

Last Modified: Nov 22, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
10.2.4, 11.2.1, 11.3.0, 11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF6, 11.4.0 HF6, 11.2.1 HF12, 10.2.4 HF12

Opened: Oct 30, 2013
Severity: 2-Critical
Related Article:


TMM accumulates large numbers of incoming ARP packets that are not released, but instead are leaked, which eventually causes tmm slowdown/core.


TMM memory usage increases and the system issues a SIGABRT, eventually resulting in traffic outage.


This can occur when using a vlangroup with two devices on the same vlan.


Do not use vlangroups.

Fix Information

The system now correctly handles packets output on members of vlangroups where the packets are cached replies for the same vlan on which the request arrived.

Behavior Change