Dear Alain, all, GI-DS-Lite is one option among others to limit the effect the of the IPv4 address depletion. It introduces a tunnel between a PGW/GGSN and a CGN, this has some impacts on the gateway. This tunnel can be of any nature, IPv6 is only an option.
Other solutions such as enabling a NAT44 (or even a NAT64 to prepare for an IPv6-only mode) in the GGSN/PGW or enforce routing policies to redirect the traffic to a CGN which is used to service a set of PGWs/GGSNs is also a valid scenario which solves the problem addressed by GI-DS-Lite. The pressure on the private IPv4 addresses if any can be solved by adopting a per-interface (TID of GTP can be sued for de-multiplexing purposes, and the same private IPv4 address can be assigned to requesting UEs). Note that both solutions may be deployed in a standalone scheme: i.e., without any plan to enable IPv6... To sum up, my proposal is: instead of adopting a document which describes one possible solution, document other "viable" options too for fairness. I don't know if the IETF is the right place for this, but the impact of GI-DS-Lite on existing 3GPP architectures should be assessed. Cheers, Med -----Message d'origine----- De : softwires-boun...@ietf.org [mailto:softwires-boun...@ietf.org] De la part de Alain Durand Envoyé : mercredi 5 mai 2010 23:57 À : softwires@ietf.org Objet : [Softwires] GI-DS-lite as working group item? Dear WG, At the 3GPP-IETF interim meeting, there was strong interest in GI DS-lite, and the recommendation was the IETF should take on its standardization. There was similar interest shown during the last IETF meeting and an informal show of hands demonstrated large support to take GI DS-lite as a working group item. This of course need to be confirmed on the list, and unless we hear otherwise, we, Softwires chairs, will work with our ADs to add GI-DS-lite on our charter. - Alain, softwires co-chair. _______________________________________________ Softwires mailing list Softwires@ietf.org https://www.ietf.org/mailman/listinfo/softwires ********************************* This message and any attachments (the "message") are confidential and intended solely for the addressees. Any unauthorised use or dissemination is prohibited. Messages are susceptible to alteration. France Telecom Group shall not be liable for the message if altered, changed or falsified. If you are not the intended addressee of this message, please cancel it immediately and inform the sender. ******************************** _______________________________________________ Softwires mailing list Softwires@ietf.org https://www.ietf.org/mailman/listinfo/softwires
