Bug ID 507849: Some packets discarded by BIG-IP are not displayed in tcpdump captures

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 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:

Opened: Feb 18, 2015

Severity: 3-Major


Packets which arrive on a BIG-IP VLAN with equivalent source and destination MAC addresses (for example, Ethernet "Loop" packets with ethernet type 0x9000) are discarded by BIG-IP and are not displayed in tcpdump captures taken on the BIG-IP. Additionally, some packets that are discarded because they match AFM DoS network attack vectors are also absent from tcpdump captures taken on the BIG-IP.


Lack of insight into what packets have been delivered to a TMM VLAN.


These types of packets sent to a BIG-IP on a TMM VLAN.



Fix Information

Packets matching these criteria now appear when inspecting the output of tcpdump on a BIG-IP.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips