Bug ID 458104: LTM UCS load merge trunk config issue

Last Modified: Sep 13, 2023

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

Known Affected Versions:
10.2.3, 10.2.4, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.5.1, 11.5.2, 11.5.3, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.0.0, 11.6.0 HF6, 11.5.4

Opened: Apr 21, 2014

Severity: 3-Major

Related Article: K16795


Performing the ucs sys load command does not overwrite trunk interface configuration, it merges with the existent setting. When loading UCS with RMA flag, you may not get expected results. The expected outcome is that the trunk is overwritten, not merged.


The trunk incorrectly appears as merged, having both sets of interfaces. The config on disk bigip_base.conf shows the correct config. Reboot does not resolve the issue.


Current configuration has a trunk with several interface members. The UCS to be loaded contains the same trunk name but with other interfaces.


1. Restore the BIG-IP configuration to factory default settings using the command sequence: -- load sys config default. -- load sys ucs example.ucs no-license. -- save sys config. 2. Force the mcpd process to reload the BIG-IP configuration with the command sequence: touch /service/mcpd/forceload. -- load sys ucs example.ucs no-license. -- save sys config.

Fix Information

Trunk config member interfaces are no longer merged during load. Only the trunk member interfaces defined in the config are present after a load.

Behavior Change

Guides & references

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