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

Last Modified: Mar 21, 2019

Bug Tracker

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

Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 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, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 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, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4

Fixed In:
12.0.0

Opened: Feb 18, 2015
Severity: 3-Major

Symptoms

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.

Impact

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

Conditions

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

Workaround

None

Fix Information

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

Behavior Change