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Source address translation in overlay networks

  • US 9,876,711 B2
  • Filed: 09/04/2014
  • Issued: 01/23/2018
  • Est. Priority Date: 11/05/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, at a first access switch in an overlay network, an encapsulated packet from a tunnel endpoint in the overlay network, the encapsulated packet originating from a host associated with the tunnel endpoint and encapsulated at the tunnel endpoint with a first source tunnel endpoint address and a destination tunnel endpoint address of a second access switch in the overlay network;

    replacing the first source tunnel endpoint address in the encapsulated packet with a second source tunnel endpoint address of the first access switch to yield a translated packet;

    transmitting the translated packet from the first access switch towards the destination tunnel endpoint address; and

    recording, in a translation table at the first access switch, an association between the host and the first source tunnel endpoint address;

    wherein the second access switch is configured to forward the translated packet to a second tunnel endpoint associated with the second access switch.

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