Global traffic management system using IP anycast routing and dynamic load-balancing

A computer-readable storage medium storing one or more sequences of instructions for resolving a domain name resolution request, wherein execution of the one or more sequences of instructions by one or more processors causes the one or more processors to perform the steps:

• assigning a first IP address to each of a plurality of domain name servers distributed across a plurality of point of presences;
• assigning a second IP address to a first subset of said plurality of domain name servers, wherein said second IP address is different than said first IP address;
• assigning a third IP address to a second subset of said plurality of domain name servers, wherein said third IP address is different than said first and second IP addresses;
• wherein said first subset is different than said second subset;
• receiving said domain name resolution request on a domain name server in said first subset of said plurality of domain name servers using said second IP address when said domain name resolution request sent to said first IP address times out;
• and
• receiving said domain name resolution request on a domain name server in said second subset of said plurality of domain name servers using said third IP address when said domain name resolution request sent to said second IP address times out.

An apparatus for resolving a domain name resolution request, comprising:

• one or more processors;
• a machine-readable medium storing instructions which, when executed by the one or more processors, cause the one or more processors to perform the steps of:
• assigning a first IP address to each of a plurality of domain name servers distributed across a plurality of point of presences;
• assigning a second IP address to a first subset of said plurality of domain name servers, wherein said first IP address is different than said first IP address;
• assigning a third IP address to a second subset of said plurality of domain name servers, wherein said third IP address is different than said first and second IP addresses;
• wherein said first subset is different than said second subset;
• receiving said domain name resolution request on a domain name server in said first subset of said plurality of domain name servers using said second IP address when said domain name resolution request sent to said first IP address times out;
• and
• receiving said domain name resolution request on a domain name server in said second subset of said plurality of domain name servers using said third IP address when said domain name resolution request sent to said second IP address times out.