Designating a primary NIC when creating a network bond

This document (7010254) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 11


How to designate a NIC to be primary when creating a bonded network
Primary NIC in bonded environment
Linux bond
Bonded network interface cards

When creating an active-failover bond, it is sometimes desired that one particular interface be designated as primary.


To accomplish this, complete the following steps:

1. From a terminal, execute the following command:
vi /etc/sysconfig/network/ifcfg-bondX

2. Modify the line that says:

BONDING_MODULE_OPS='mode=active-backup miimon=100'


BONDING_MODULE_OPS='mode=active-backup miimon=100 primary=ethX'

<where ethX is the interface you'd like to make primary>

3. Restart the network

rcnetwork restart

4. Verify the change took:

cat /proc/net/bonding/bondX

Additional Information

This option can also be set via YaST.  The same modification as described above can be made to the highlighted area.


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:7010254
  • Creation Date: 05-Mar-2012
  • Modified Date:12-Mar-2021
    • SUSE Linux Enterprise Server

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