hi, bonding does not work when booting kernel-PAE-2.6.18-164.el5 module load failed on unresolved symbols Sep 17 11:36:53 monitor kernel: bonding: Unknown symbol ndisc_build_skb Sep 17 11:36:53 monitor kernel: bonding: Unknown symbol in6_dev_finish_destroy Sep 17 11:36:53 monitor kernel: bonding: Unknown symbol ndisc_send_skb Sep 17 11:36:53 monitor kernel: bonding: Unknown symbol unregister_inet6addr_notifier Sep 17 11:36:53 monitor kernel: bonding: Unknown symbol register_inet6addr_notifier looks like ipv6.ko isn't load automatically. ipv6 is disabled. # chkconfig --list ip6tables ip6tables 0:off 1:off 2:off 3:off 4:off 5:off 6:off #cat /etc/modprobpe.conf alias scsi_hostadapter cciss alias eth0 bnx2 alias eth1 bnx2 alias bond0 bonding options bonding mode=1 miimon=100 options ipv6 disable=1 #cat /etc/sysconfig/network NETWORKING=yes NETWORKING_IPV6=no thx ulrich