Bug ID 759794: X520 virtual functions require trusted mode for MAC masquerading

Last Modified: May 29, 2024

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

Known Affected Versions:,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,

Opened: Feb 26, 2019

Severity: 3-Major

Related Article: K25057050


BIG-IP Virtual Edition (VE) cannot support MAC masquerading when using virtual functions from X520 NICs (ixvf) unless trusted mode is configured on the host. When trusted mode is not configured on the host, the system fails to set the floating MAC after failover.


MAC masquerading does not function properly.


-- BIG-IP VE in high availability (HA) configuration. -- ixvf devices configured with MAC masquerading. -- Trusted mode is not enabled on the host.


Enable trusted mode on the host for the virtual functions.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips