Just saw this in one of my servers in /etc/modprobe.conf
alias bond0 bonding
alias bond1 bonding
options bonding mode=active-backup max_bonds=2
Here is the explanation of the bonding modes:
# bonding modes:
# 0 sets a round-robin policy for fault tolerance (FT) and load
balancing (LB)
# 1 sets an active-backup policy for FT
# 2 sets an xor (exclusive-or) policy for FT and LB
# 3 sets a broadcast policy for FT
# 4 sets an IEEE 802.3ad dynamig link aggregation policy
# 5 sets a transmit load balancing (TLB) policy for FT and LB
# 6 sets an active load balancing (ALB) policy for FT and LB
#
Thanks,
Dave