Bug ID 758387: BIG-IP floods packet with MAC '01-80-c2-00-00-00' to VLAN instead of dropping it

Last Modified: Sep 13, 2023

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

Known Affected Versions:
13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 14.1.2.4, 15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2

Fixed In:
15.1.0, 15.0.1.3, 14.1.2.5, 14.0.0.5

Opened: Feb 11, 2019

Severity: 3-Major

Symptoms

In STP 'passthru' mode, any packet sent to the BIG-IP system with a destination MAC of 01-80-c2-00-00-00 is treated as an STP bridge protocol data unit (BPDU), and is flooded to the VLAN.

Impact

A packet that is not an STP BPDU, but is sent to the same destination MAC address may be flooded as if it was a BPDU.

Conditions

-- The BIG-IP system is configured for STP 'passthru' mode -- The BIG-IP system receives a packet with MAC 01-80-c2-00-00-00.

Workaround

None.

Fix Information

Added an STP drop rule for certain LLDP-type packets sent to STP destination MAC: # list sys db bcm56xxd.rules.lldp_drop sys db bcm56xxd.rules.lldp_drop { value "disable" } It is disabled by default. You must manually set it to cause the LLDP frames to be dropped in STP passthrough mode.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips