Bug ID 881041: BIG-IP system may forward IP broadcast packets back to the incoming VLAN interface via a forwarding virtual server.

Last Modified: Mar 10, 2020

Bug Tracker

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

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3

Opened: Feb 14, 2020
Severity: 3-Major

Symptoms

Some received packets are retransmitted back on the incoming VLAN interface.

Impact

Broadcast packets are forwarded back to the incoming VLAN interface might result in loops if there are multiple gateways on the network.

Conditions

The symptom is found with the following conditions: 1. A forwarding virtual server is configured. 2. A packet is received whose destination MAC address is its unicast VLAN MAC address and the destination IP address is the broadcast address of that subnet.

Workaround

None.

Fix Information

None

Behavior Change