Fujitsu
Transition Working Group, IPv6 Promotion Council
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Akihiro Inomata of Fujitsu reported on the activities of Transition Working Group at IPv6 Promotion Council. The working group was formed to make guidelines on transition to IPv6. The group plans to publish document on recommended IPv6 transition procedure by adoption phases and areas.
The working group has formed sub working groups for four transition areas of large enterprises/governments, small and medium enterprises, homes, and ISPs, in order to discuss transition procedure guidelines.
Transition guidelines for each area will be authored for two transition phases: "IPv6 Adoption Phase", for one year to come, and "IPv6 Utilization Phase", for 2 to 3 years later.
Guidelines for IPv6 Utilization Phase will consider features and services not available at present. The group will clarify unavailable but necessary features for transition, and encourage product and service vendors to support them.
The following will be discussed for guidelines by transition areas:
- For large enterprises, two transition scenarios will be discussed. One is gradual replacement of IPv4 after dual stacking. The other is integration of IPv4 and IPv6 networks after IPv6 network is built independent of IPv4 infrastructure.
-For small and medium enterprises, communication infrastructure can easily support IPv6, as network structure is relatively simple. The group aims to outline recommended scenarios by purposes of IPv6 adoption, such as IP phones and remote maintenance.
-For home, IPv6 support is fairly easy. It can be instantly realized with the use of tunneling technology. Some consumer electronics manufacturers are exploring the possiblity of IPv6-only support, due to lkimited resources on their devices, but they may have to provide access to IPv4 Internet with different means.
ISP transition guidelines will be targeted for small and medium service providers. It will be basically recommended to use different routers for IPv4 and IPv6 networks, to avoid adverse influences to their IPv4 services. IPv4 and IPv6 traffic will share the ISP backbone networks at layer 2. Servers will be gradually given IPv6 support, starting with service servers which are visible from users. ISP internal network will be based on dual stack.
One of the early findings of the working group is about multihoming. IPv4 multihoming does not afect private addressing of organization network. It dynamically selects communication paths outside NATs. On the other hand, IPv6 multihoming might be performed at terminal level, as they can have plural IPv6 global addresses on the same interface.
Two approaches can be considered for IPv6 security. One approach would stress the role of gateways to the outside network. The other is based on terminal level security. Terminal level security means more processing load on each node. On the other hand, gateway-based security leads to less flexibility in the use of network. We need to find optimal balance between the two, said Inomata.
The transition working group will publish draft of their guideline document for public review.
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