10. IPv4 service continuity: "Lightweight IPv4 over IPv6" case study

The IETF has specified an IPv4 service continuity solution, called "Lightweight IPv4 over IPv6" . This solution consists of allocating the same IPv4 public address to several clients; these clients also receive non-overlapping port ranges.

These port ranges are used to demultiplex communications between clients sharing the same IPv4 address. The port range assigned to a client thus constitutes a unique means of identification, designed to guarantee reliable routing of return traffic to these clients.

Example

• On the network...

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IPv4 service continuity: "Lightweight IPv4 over IPv6" case study

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Bibliography

(1) - 3GPP - Policy and charging control architecture. - Sept. 2012.
(2) - ABDESSELAM (M.), BOUCADAIR (M.), HASNAOUI (A.), QUEIROZ (J.) - PCP NAT64 Experiments. - Draft-boucadair-pcp-nat64-experiments (work in progress), sept. 2012....