Patent ID: 7609619

Claim:
In an autonomous system, a method for load balancing and recovering from a disaster comprising: hosting active applications and serving clients from at least two active data centers in said autonomous system; advertising the same route from said at least two active data centers; routing client traffic to one of said plurality of data centers using IP Anycast mechanism; using “advertise active” command in route health injection (RHI) to install a host route in an edge router if a virtual server in said data center is in an operational state; advertising the availability of a virtual IP (VIP) address throughout the network; injecting, from an internal routing protocol into an external routing protocol, a static route by redistribution; configuring route summarization in OSPF; configuring BGP route redistribution and route preference to update neighboring routers; and using Interior Gateway Protocol and sub-net based load balancing on a direct link between said at least two active data centers.