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

  • US 8,243,588 B2
  • Filed: 04/08/2009
  • Issued: 08/14/2012
  • Est. Priority Date: 02/25/2005
  • Status: Active Grant
First Claim
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1. A stand-by network device comprising:

  • a first interface to receive a list of prefixes from a primary network device of a primary data center, the list of prefixes being storable in a gateway table accessible to the stand-by network device, the first interface being configured to receive a prefix from the primary network device over an internal BGP data link; and

    a second interface to advertise a secondary prefix to at least one of a plurality of internet service providers, if a prefix is missing from the list of prefixes storable in the gateway table accessible to the stand-by network device and received from the primary network device over the internal BGP data link.

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