Methods and devices for routing data packets between IPv4 and IPv6 networks

  • US 9,019,965 B2
  • Filed: 10/20/2010
  • Issued: 04/28/2015
  • Est. Priority Date: 10/30/2009
  • Status: Active Grant
First Claim
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1. A method of routing an IPv4 data packet sent by a source terminal belonging to a first IPv4 domain, via an IPv6 domain, to a destination terminal belonging to a second IPv4 domain, said second IPv4 domain being private, said method comprising, on reception of said IPv4 data packet from said source terminal:

  • constructing an IPv6 destination address;

    encapsulating the IPv4 data packet in an IPv6 data packet carrying said IPv6 destination address; and

    routing said IPv6 data packet in said IPv6 domain;

    wherein the IPv6 destination address is constructed by combining an IPv6 prefix and the private IPv4 address of said destination terminal in the second IPv4 domain.

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