We have two data centers we connected via 100MB MetroEthernet. Both have ISP/Internet connections via Firewalls and each data center uses 6500's at the core with a default static 0.0.0.0 route for internet traffic to it's firewall IP.
Since we connected the two centers via 100 bm the core 6500's seem to fight over which default 0.0.0.0 will route Internet traffic because at one site access will go away for a minute or two and then "reappear". Now I'm looking for a EIGRP solution for keeping each site to itself yet we need to redistribute some static routes from our from the core devices to our enterprise network. Route maps or something else better?