Hi, I configure bonding interfaces a bit differently. I put only this line into /etc/modprobe.conf : alias bond0 bonding And use this in /etc/sysconfig/network-scripts/ifcfg-bondX : DEVICE=bond0 BOOTPROTO=none IPADDR=192.168.100.1 NETMASK=255.255.0.0 ONBOOT=yes BONDING_OPTS="miimon=100 mode=1 primary=eth0" I've got setup running like this in mode 1 (failover) and in mode 4 (LACP). Unfortunately I don't have any systems with more then 1 bond and I don't have anything spare to set this up. But you can try your setup using this way to configure it, maybe that helps. Regards, Tim -- Tim Verhoeven - tim.verhoeven.be at gmail.com - 0479 / 88 11 83 Hoping the problem magically goes away by ignoring it is the "microsoft approach to programming" and should never be allowed. (Linus Torvalds)