Bug ID 673998: Dhclient does not support standard supersede options on the BIG-IP system.

Last Modified: Jan 29, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP VE(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, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4

Fixed In:
14.0.0

Opened: Jul 13, 2017
Severity: 3-Major

Symptoms

Dhclient supports the supersede option through which locally set value/values can supersede DHCP server-provided values in the lease for a given option. This is achieved by adding the supersede-option and value pair in dhclient.conf. In case of the BIG-IP system, the modifications in dhclient.conf are overwritten by MCPD, and MCPD does not support specifying supersede-options.

Impact

The system overwrites the modifications. Cannot supersede DHCP server-provided values in the lease for a given option.

Conditions

-- BIG-IP configured with DHCP enabled. -- Attempt to supersede DHCP server-provided values in the lease for a given option by adding the supersede-option and value pair in dhclient.conf.

Workaround

None.

Fix Information

The BIG-IP system now supports the standard supersede options, so you can direct dhclient to use locally-configured values over the ones provided by the DHCP server for a given option.

Behavior Change