Bug ID 442993: An unexpected gateway may be selected for the management interface

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1

Fixed In:
11.6.0, 11.5.2, 11.4.1 HF9

Opened: Jan 14, 2014

Severity: 3-Major

Related Article: K15450


Unexpected gateway via management interface (in /etc/sysconfig/network) is created whenever a specific management-route is configured using tmsh. This unexpected configuration is applied onto the kernel after a reboot.


An incorrect gateway is configured after a reboot.


This occurs when a specific non-default management-route is configured, and the default management-route is not configured.


You can avoid the issue by configuring a default management-route if you are using non-default management-routes. As a workaround for the issue, delete the unexpectedly created management default route following every reboot. To do so, use a command similar to the following: 'ip route del default dev eth0' or 'ip route del default dev mgmt'. You can include the appropriate command in the file /config/startup to have the command run automatically after each boot operation.

Fix Information

The system uses only the default management-route to configure the gateway If the default management-route is not configured, the system does not create the gateway. This is correct behavior.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips