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%include "default.mgp"
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Overview of IPv6
and
Recent Activities on 6bone
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IIJ Research Laboratory
Kazu YAMAMOTO
kazu@iijlab.net
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Why IPng?
Preventing expansion of routing table
One class B for one site
Exhaustion of class B
Assignment of multiple class Ces
Expansion of routing table
Inventing CIDR
Nonetheless, the Internet is growing
Exhaustion of entire IPv4 address space
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Need IP with huge address space
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IPng or IP next generation
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Features of IPv6
Enlarging address
2^32 = 43 million -> 2^128 = 3.4 x 10^38
Simplifying IP header
Deleting Header Length, TOS, Offset
Header Daiy Chain
Kicking out rare options (e.g. fragment)
Defining flexible options
Plug and Play
Obtain default routes and prefixes
Security
IPsec is a MUST
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IPv6 header
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4 times for address length, twice of header length
Options are implemented by extension headers
Maximum Hop Limit is 255
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Duplicate Address Detection
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Sending Neighbor Solicitation Message
Dst is Solicitation Multicast Address
Src is Unspecified Address (::)
Target is my tentative address
When conflicted
Announce the duplication by Neighbor Solicitation
Dst is Link-Local All Node Multicast
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