OSPF - Route selection

Hello,

I have two Cisco routers connecting between site A and site B and configured OSPF on the both routers.  There are one layer 3 switches at each location connected to those two routers.

Right now, it seems like it is doing loadbalancing between the routers.

For example, when I traceroute from siteA to site B, it goes trhough router A then when I traceroute again and it goes through routerB.  Back and forth, constantly.

How do I make it so that it only goes through routerA and when routerA fails, then go through router B without using the static route.

I'm trying to use router B as backup only.

Thanks.
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giltjrCommented:
Make the cost on router B higher by changing the cost the IP interface on router B:

http://www.cisco.com/en/US/docs/ios/iproute_ospf/command/reference/iro_osp1.html#wp1014093
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