Bug ID 635703: Interface description may cause some interface level commands to be removed

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1,

Opened: Dec 23, 2016
Severity: 3-Major
Related AskF5 Article:


Adding a description to the interface from within ZebOS may cause interface level routing protocol commands to be lost on restart.


Interface level commands after the description will not appear in the imish running config and will not be loaded/functional.


- Add interface level description to a configuration with interface level routing protocol commands. - Restart services, tmrouted, or reboot.


To prevent this issue, do not use interface-level descriptions. If the issue has already occurred, and the configuration is not loading, you can manually correct it using the following procedure: 1. Stop tmrouted using the following command: bigstart stop tmrouted 2. Edit the ZebOS.conf from the corresponding route-domain file manually and remove the interface-level 'description' and 'no shutdown' commands. 3. Restart tmrouted using the following command: bigstart restart tmrouted. Note: Performing the workaround procedure will temporarily disrupt dynamic routing, so care and adequate planning must be taken into consideration.

Fix Information

Routing protocol interface commands are no longer lost with the addition of interface descriptions.

Behavior Change