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Communication path selection for content delivery

  • US 10,536,372 B2
  • Filed: 01/05/2018
  • Issued: 01/14/2020
  • Est. Priority Date: 02/04/2014
  • Status: Active Grant
First Claim
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1. A method of operating a content delivery network comprising:

  • assigning multiple internet protocol addresses to a cache node in the content delivery network, wherein the content node caches content on behalf of content origins, and wherein each of the multiple internet protocol addresses corresponds to a different one of multiple internet service providers that connect to the cache node;

    specifying in a domain name system configuration which of the multiple internet protocol addresses assigned to the cache node to use when responding to domain name requests sent from multiple ranges of internet protocol addresses, wherein the domain name requests comprise domain names associated with the content origins;

    tracking a latency of content requests sent from the multiple ranges of internet protocol addresses to the multiple internet protocol addresses assigned to the cache node; and

    if the latency of the content requests sent from a range of internet protocol addresses exceeds a threshold, changing in the domain name system configuration which one of the multiple internet protocol addresses assigned to the cache node to use when responding to subsequent domain name requests sent from the range of internet protocol addresses.

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