IPv6 Rapid Deployment in Taiwan Academic Network (TANet)

Authors:Po-Kang ChenChia-Wen LuQuincy Wu

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Outline• Introduction– IPv4 exhaustion– Transition mechanisms

• Related Work– 6to4 Tunnel– 6RD Tunnel

• Implementation– Architecture– Customer Edge– Border Relay

• Conclusion & Future Work

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Introduction• There is no Unallocated IPv4 address at IANA

since February 3rd 2011. • In other words. There will be lots of device

needs to use pure IPv6 to connect to the Internet in the future.

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Introduction(cont.)

• The transition from IPv4 to IPv6 take times. During this period, the different networks, IPv4s and IPv6s, need to communicate with each other.

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IPv6IPv4

Introduction(cont.)

• The transition mechanisms include three major categories:– Dual-stack– Translation– Tunneling– 6to4 tunnel, 6RD tunnel, etc.

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Related Work

• 6to4 Tunnel Feature• 6to4 Prefix :

2002 : Public IPv4 address ::\48

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IPv4IPv6

2001:0DB8::1Host H2

6to4 hostHost H1

6to4 Relay Router

Router R

192.88.99.1

Related Work(cont.)

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IPv4 IPv6

2001:0DB8::1Host H2

6to4 hostHost H1

6to4 hostHost H3

6to4 Relay Router

Router R

192.88.99.1

• 6to4 Tunnel Disadvantage (From ISPs view)

Related Work(cont.)

• 6RD Tunnel• Prefix: Same as the ISPs• Public IPv4 address: Use on the Customer Edge

IPv6 IPv4

IPv6

Customer Edge

Border Relay

2001:55c::/328

Related Work(cont.)

• 6to4 and 6RD Comparison

6to4 6RD

Prefix 2002::/16 Same as ISP

Scale Bounded Unbounded

NAT Not Allowed Allow

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Implementation• Implementation architecture

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IPv6 IPv4

IPv6

ASUS RT-N16(CE)

Cisco 2811(BR)

6RD host

Implementation(cont.)

• CE– Upgrade the RT-N16

firmware from DD-WRT– Configure the router to

advertise the ISP prefix

• We first build the tunnel with Comcast’s BR

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Implementation(cont.)

• Cisco 2811– Upgrade the IOS to version 15.1(3)T1 with 6RD

support

– Configure the tunnel informations

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Conclusion & Future Work

• Conclusion– Unfortunately we encountered some unknown

problems so that there is no 6RD traffic between our CE and BR.

– As soon as we overcome the problem, the 6RD implementation in TANet will be completed.

• Future Work– Security Issue– Traffic Measuring and Analyzing

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