Active / passive bonding with different IP address ranges

Solution Unverified - Updated -


Using virtual interfaces on bond interfaces with IP addresses from different CIDR ranges does not work.

If bond0 has the IP address and the arp_ip_target is set to (a router) the bonding works.
Once we add another IP address on a virtual interface on top of bond0, we run into a problem.

ifconfig bond0:1

From now on the bonding driver will use the IP address as the source IP address inside the arp request which will never be answered as the router does not respond to this request.


  • Red Hat Enterprise Linux 5
  • Bonded interfaces in active passive mode
  • Virtual IP address bound to the bond interface with an IP address from a different subnet
  • Kernel prior to kernel-2.6.18-308.8.1.el5

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