wicked controlled interfaces activate IP addresses only if a carrier signal was detected

This document (7022200) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)
SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)
SUSE Linux Enterprise Server 12 Service Pack 3 (SLES 12 SP3)


As of SLES 12, wicked controlled network interfaces are started with their IP address only if a carrier signal was detected but in some situations (e.g. automated tests) it is desired to have an IP address listening on a network device even if no carrier signal is available.


Please add LINK_REQUIRED='no' to the respective /etc/sysconfig/network/ifcfg-* file.


By default wicked uses LINK_REQUIRED='yes' when setting up the devices and waits indefinitely for a carrier signal before assigning an IP address.

Additional Information

Please see
man 5 ifcfg
for details on LINK_REQUIRED control option.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7022200
  • Creation Date: 26-Oct-2017
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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