Cisco Technology, Inc.

Vinay Gundi

Zeeshan Naseh

The present invention provides an active/standby data center that avoids the delay associated with a cached DNS entry to switch from the active data center to the standby data center. When the active data center becomes unavailable, the standby data center advertises the same address as the primary data center so the change over occurs quickly. When the IP address of the primary data center is no longer visible to the standby data center, the standby data center begins to advertise.

Disaster recovery for active-standby data center using route health and BGP

A distributed data center topology having at least a pair of active data centers that can recover from a disaster at one of the data centers and achieves load balancing using IGP (Interior Gateway Protocol) between data centers. The distributed data centers use virtual IP addresses, route health injection and Border Gateway Protocol (BGP) for business continuance, disaster recovery and load balancing. Active applications are deployed at each data center to provide a logical active/standby configuration for certain applications. Alternatively, active applications are deployed at both sites and BGP routes traffic to the closest data center edge router. Load balancing occurs over an internal IGP link between sites.

Application based active-active data center network using route health injection and IGP

A distributed data center topology having at least a pair of active data centers that can recover from a disaster at one of the data centers and achieves load balancing using IGP (Interior Gateway Protocol) between data centers. The distributed data centers use virtual IP addresses, route health injection and Border Gateway Protocol (BGP) for business continuance, disaster recovery and load balancing. The active/active topology supports load balancing where each site concurrently hosts active applications or applications can be hosted in a logical active/standby mode. IGP and RHI (Route Health Injection) are used to propagate routes to an edge router and BGP (Border Gateway Protocol) and IP Anycast are used for site-to-site recovery and load balancing between data center sites.

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San Jose, CA, United States of America

Vinay Gundi