Bug ID 843597: Ensure the system does not set the VE's MTU higher than the vmxnet3 driver can handle

Last Modified: Jul 07, 2020

Bug Tracker

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

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,, 15.0.0, 15.0.1,,,, 15.1.0,,,,

Opened: Oct 28, 2019
Severity: 3-Major


The vmxnet3 driver cannot handle MTUs larger than 9000 bytes.


Either packets are dropped, or the hypervisor may crash on some platforms that do not handle this condition gracefully.


-- Using a BIG-IP Virtual Edition (VE) with the vmxnet3 driver. -- Passing packets larger than 9000 bytes.


Modify the tmm_init.tcl file, adding the following line: ndal mtu 9000 15ad:07b0

Fix Information


Behavior Change