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IPv6 Transition Solutions for 3GPP Networks

IPv6 Transition Solutions for 3GPP Networks. draft-wiljakka-3gpp-ipv6-transition-01.txt. Juha Wiljakka, Nokia v6ops Interim meeting, Sunnyvale, CA, USA 19.09.02. The most extensive scenario. Dual stack UE: both stacks can be simultaneously active.

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IPv6 Transition Solutions for 3GPP Networks

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  1. IPv6 Transition Solutionsfor 3GPP Networks draft-wiljakka-3gpp-ipv6-transition-01.txt Juha Wiljakka, Nokia v6ops Interim meeting, Sunnyvale, CA, USA 19.09.02

  2. The most extensive scenario. Dual stack UE: both stacks can be simultaneously active. Managing the IPv4 address pool is a challenge. Use of private IPv4 addresses means use of NATs. Tunneling can be made in the UE if needed (in the case the GGSN does not support IPv6 Access Points). GPRS scenario 1 1. Dual stack UE connecting to IPv4 and IPv6 nodes (Peer) Node IPv4 network IPv4 PDPcontext IP GGSN IPv6 network (Peer) Node 2G / 3G mobile network Edge Router IPv6 PDPcontext UE

  3. “IPv4 in IPv6” (static or dynamic) tunneling in the network The scenario is not considered very likely in 3GPP networks. Making the ”IPv6 in IPv4” tunneling in the network. Tunneling can be static or dynamic. Compare with 6bone. IPv4 network GPRS scenarios 2 and 3 2. IPv6 UE connecting to IPv6 node through an IPv4 network (Peer) Node IPv6 network GGSN IP IPv6 PDPcontext 2G / 3G mobile network Edge Router UE ”IPv6 in IPv4” tunnel 3. IPv4 UE connecting to IPv4 node through an IPv6 network (Peer) Node IPv4 network IPv6 network GGSN IP IPv4 PDPcontext 2G / 3G mobile network Edge Router UE ”IPv4 in IPv6” tunnel

  4. GPRS scenarios 4 and 5 4. IPv6 UE connecting to an IPv4 node (Peer) Node IPv4 network / Internet • Translation is needed, because the UE and the peer node do not share the same IP version. • NAT-PT has certain problems. Trans- lator IP GGSN 2G / 3G mobile network Edge Router IPv6 PDPcontext UE 5. IPv4 UE connecting to an IPv6 node (Peer) Node IPv6 network Trans- lator IP GGSN IPv4 PDPcontext 2G / 3G mobile network Edge Router UE

  5. UE has IPv6 connection to the IMS and from IMS to an IPv4 node. Translation needed in two levels: SIP and SDP in an ALG. User data traffic at IP level. This is a challenging case. Closely related to GPRS scenario 2. Connection of two IPv6-only IMS islands has to be made over IPv4 network. Compare with 6bone. IMS scenarios 1 and 2 1. UE connecting to a node in an IPv4 network through IMS (Peer) Node S-CSCF ALG IPv4 network P-CSCF IMS (IPv6-only) Trans- lator GGSN 2G / 3G mobile network UE 2. Two IMS islands connected via an IPv4 network (Peer) Node IMS (IPv6-only) IPv4 network IMS(IPv6-only) Edge Router GGSN 2G / 3G mobile network (Static) ”IPv6 in IPv4” tunnel UE

  6. IPv4/IPv6 issues related to SIP • IMS scenario 1 is challenging due to two levels of translation: • SIP / SDP signalling (-> SIP ALG) • User IP traffic (-> Translator, such as NAT-PT) • In the proposed solution, SIP ALG translates SIP traffic, and also coordinates user IP traffic translation. • E.g. setting up the IP addresses in the user traffic translator.

  7. We are asking for your participation • We appreciate comments and input from the people in the v6ops wg a lot. • Please read the documents and give comments on the v6ops mailing list. Comments can also be sent directly to the document editor juha.wiljakka@nokia.com • Can this draft become a WG draft?

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