Bug ID 504396: When a virtual's ARP or ICMP is disabled, the wrong mac address is used

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1

Fixed In:
12.0.0, 11.6.1 HF1, 11.5.3

Opened: Feb 03, 2015
Severity: 3-Major
Related AskF5 Article:


When using tmsh to modify the icmp_enabled or arp_enabled property of a virtual address object from true to false, tmm does not reset the internal state properly. This results in a tmm using the VLAN's true MAC as the source MAC instead of the traffic group's MAC masquerade address.


Packets may be dropped by switches or routing tables improperly updated.


Using MAC masquerading in a high availability (HA) traffic group.



Fix Information

When a virtual server's ARP or ICMP is disabled, the correct MAC address is now used.

Behavior Change