This should work on RHEL, Centos, and Fedora alike.
bond0 = eth0 and eth1
ifenslave -c bond0 eth1 (will change the currently active slave to eth1)
echo -eth0 > /sys/class/net/bond0/bonding/slaves (will remove eth0 from the bonding interface running)
echo +eth0 > /sys/class/net/bond0/bonding/slaves (will add eth0 to the bonding interface running)