See the configuration RHEL instructions:
http://www.cyberciti.biz/nixcraft/vi...le-network.php

However the line:
options bond0 mode=balance-alb miimon=100

Should be as follows:
options bond0 mode=active-backup miimon=100

balance-alb is adaptive load balancing: includes balance-tlb plus receive load balancing (rlb) for IPV4 traffic, and does not require any special switch support.

Where, active-backup Only one slave in the bond is active. A different slave becomes active if, and only if, the active slave fails. The bond's MAC address is externally visible on only one port (network adapter) to avoid confusing the switch.

Hope this helps