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KDDI TrialHub & Spoke

Shu YamamotoCarl Williams

Hidetoshi Yokota

KDDI R&D Labs

2

Trial Overview

• Trial for Home Users – To find the new service capability by IPv6 global reachability

(connectivity from anywhere to user’s home network)– To confirm IPv6 usefulness.– Technical and operational verification of tunnel service

• IPv6 Tunnel Service Trial in FTTH users– IPv4 over IPv6 tunnels are setup between Home Gateway a

nd Tunnel server over ISP IPv4 access network– 1000 tunnels are always activated throughout Japan.– Trial is from November 28, 2005 to March 31, 2006.

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Trial Service

• Connectivity– To provide the connectivity from user’s PC in outside IPv4

network to home network.– To provide the connectivity from cellular phone to home

network.

• Applications through Tunnel– Photos or Movie taken by a cellular phone is uploaded from

outside to PC in user’s home network.– To access the home PC from a cellular phone to properly

display the Internet WEB pages by the KDDI provided software installed in the home PC.

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IPv6 Tunnel Service Example #1

IP ｖ 4/IPv6 Dual Stack

Home Gateway（ CPE）

IP ｖ 4 Dynamic AddressIP ｖ 6 AddressIP ｖ 4 Address

ＴＳＰ Tunnel 　（ IPv6 over IPv4 ）

IPv4 InternetAddress

Translator

FTTH User

SSL

Portal Server

KDDI NetworkAccess Network

• IPv6 over IPv4 Tunnel– TSP client installed in Home Gateway. IPv6 over IPv6 tunnel is setup between Home

Gateway and TSP server located in ISP IPv6 network (KDDI Data Center).

• Connectivity from Outside– User can access to PC and devices in home network from IPv4 network with the combination

of address translator and IPv6 over IPv4 tunnel

IPv6

TSP Server

5IP ｖ 4/IPv6 Dual Stack

Home Gateway（ CPE）

IP ｖ 4 Dynamic AddressIP ｖ 6 AddressIP ｖ 4 Address

ＴＳＰ Tunnel 　（ IPv6 over IPv4 ）

Mobile IPv4 Network

AddressTranslator

FTTH User

Portal Server

KDDI NetworkAccess Network

• Connectivity from Cellular Phone– Data (photo, movie, message, etc) in cellular phone is able to

upload to the home network PC.– To access WEB page for PC from cellular phone through home PC.

IPv6

TSP Server

IPv6 Tunnel Service Example #2

Internet

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IPv6 over IPv4 Tunnel and IPv6 Address

• Tunnel Description– Tunnel is setup using Tunnel Broker Model and Tunnel Setup

Protocol (TSP)

– IPv4 over IPv6 tunnels traverses NAT at Home Gateway using UDP encapsulation.

– Tunnel connectivity maintains for dynamic IPv4 address.

• Connectivity to host in home network– /64 prefix allocated by ISP is delegated to user’s home network.

– IPv6 address of devices in home network is auto-configured.

– The devices in home network are accessed by using domain names through the portal WEB site.

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Tunnel User Requirement

• General– Tunnel configuration does not require complex setup.– Convenience for home user

• User Requirement– Home Gateway automatically setup the tunnel.– No change of IPv4 service subscription. For example, It does

not require static IPv4 address.– NAT traverse is mandatory.– High level security. For example, it requires the mechanism

to hide IP address of user’s home network.

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ISP Operational Requirement

• General Requirement– Scalable and reliable– Low cost

• Operational Requirement– Tunnel health monitoring capability (mandatory)– Tunnel log data for accounting (mandatory)– Coordination with deployed AAA server (desirable)– Flexibility for customization (desirable)

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Summary

• IPv6 tunnel service using tunnel broker was deployed for FTTH users

• TSP client (initiator) is installed at Home Gateway.• 1000 tunnels are always activated.• The connection from outside IPv4 network uses IPv6

tunnel together with address translator.• After trial, feedback from customers will be obtained in

terms of usefulness and convenience.