1. IPv6 Introduction &
Environment Buildup
Eric 2012-06-01
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2. Outline
Overview of functionality
IPv6 format
IPv6 addressing
Build up IPv6 environment
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3. Overview of functionality
Expanded addressing capability and
auto configuration mechanisms.
Simplification of the header format.
Improved support for extensions and
options.
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4. Overview of functionality
Extensions for authentication and
privacy.
Flow labeling capability.
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5. IPv6 format
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6. Structure of IPv6 Protocol
16 bytes
16 bytes
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7. Structure of IPv6 Protocol
Next header
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8. IPv6 type
IPv4 knows unicast, broadcast, and
multicast addresses. With IPv6, the
broadcast address is not used anymore;
multicast addresses are used instead.
This is good news because broadcasts
are a problem in most networks.
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9. IPv6 type
Unicast : A unicast address uniquely
identifies an interface of an IPv6 node.
A packet sent to a unicast address is
delivered to the interface identified by
that address.
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10. IPv6 type
Multicast : A multicast address identifies
a group of IPv6 interfaces. A packet
sent to a multicast address is processed
by all members of the multicast group.
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11. IPv6 type
Anycast : An anycast address is
assigned to multiple interfaces (usually
on multiple nodes). A packet sent to an
anycast address is delivered to only one
of these interfaces, usually the nearest
one.
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12. General rules
Each interface of a node needs at least
one unicast address. A single interface
can also be assigned multiple IPv6
addresses of any type (unicast,
multicast, and anycast).
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13. General rules
IPv6 supports addresses of different
scopes . There are global and non-
global (e.g., link-local, private ip)
scopes.
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14. Address Notation
2001:0DB8:0000:0000:0202:B3FF:FE1E:8329
2001:DB8:0:0:202:B3FF:FE1E:8329
2001:DB8::202:B3FF:FE1E:8329
2001:DB8::202:B3FF:254.30.131.41
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15. Address Notation
2001:DB8:0000:0056:0000:ABCD:EF12:1234
2001:DB8::56:0:ABCD:EF12:1234
2001:DB8:0:56::ABCD:EF12:1234
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16. Address Notation
192.168.0.2
x:x:x:x:x:x:192.168.0.2
0:0:0:0:0:0:192.168.0.2
::192.168.0.2 or ::C0A8:2
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17. Prefix Notation
prefix interface ID
n bit 128-n bit
The prefix length specifies how many left-most
bits of the address specify the prefix. This is
another way of noting a subnet mask.
2001:DB8:0000:0056:0000:ABCD:EF12:1234/64
2001:DB8:0000:0056::/64
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18. Routing Prefixes
Allocation Prefix binary Prefix hex
unassigned 0000 0000 ::0/8
reserved 0000 0001
global unicast 00 1 2000::/3
link-local unicast 1111 1110 10 FE80::/10
Reserved(formely FEC0::/10
1111 1110 11
site-local unicast) deprecated
local ipv6 address 1111 110 FC00::/7
private admin 1111 1101 FD00::/8
multicast 1111 1111 FF00::/8
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19. Global Unicast Address
00-02-b3-1e-83-29
interface ID
assigned by DHCPv6 00-02-b3-ff-fe-1e-83-29
from MAC address
02-02-b3-ff-fe-1e-83-29
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20. Global Unicast Address
Prefix : 001
TLA ID : 世界ISP業者最佳化路徑
Res: reserved
NLA ID : ISP業者內部最佳化路徑
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21. Global Unicast Address
Prefix Allocation RFC
Sub-TLA assignments
ARIN 2001:0400::/29
2001::/16 RIPE NCC 2001:0600::/29 RFC 2450
APNIC 2001:0200::/29
2002::/16 6to4 RFC 3056
3FFE::/16 6Bone Testing RFC 2471
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22. Link- and Site-Local Address
Link-local address
1111 1110 10 0 interface ID
10 bits 54 bits 64 bits
hex: FE80
Site-local address
1111 1110 11 0 subnet interface ID
10 bits 38 bits 16 bits 64 bits
hex: FEC0
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23. Special Addresses
The unspecified address
The unspecified address has a value of
0:0:0:0:0:0:0:0 and is therefore also called
the all-zeros address . It is comparable to
0.0.0.0 in IPv4.
Used as a Source address by a host during
the boot process when it sends out a request
for address configuration information.
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24. Special Addresses
loopback
it is represented as 0:0:0:0:0:0:0:1,
abbreviated as ::1
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25. Special Addresses
6to4 tunnel
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26. Anycast Address
Decimal Hex Description
127 7F Reserved
Mobile IPv6 Home-Agents
126 7E anycast
0-125 00-7D Reserved
Reserved Anycast IDs
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27. Multicast Address
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28. IPv6 addressing
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29. Router Solicitation and Router Advertisement
Hosts can request Router
Advertisements by issuing a Router
Solicitation.
Router Advertisements will regular send
prefix message out.
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30. Router Advertisement
M = 0, stateless
autoconfiguratio
n
M = 1, stateful
configuration (ip
from DHCP)
O = 1, get option
setting from
DHCP
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31. Stateless autoconfiguration
Global prefix Link-local prefix
MAC address
2001:470:67:24::/64 fe80::/64
00:48:54:5b:cb:9d
0248:54ff:fe5b:cb9d
2001:470:67:24: 248:54ff:fe5b:cb9d/64
fe80:: 248:54ff:fe5b:cb9d/64
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32. Stateful autoconfiguration
IPv6 address get from DHCP, just same
as IPv4.
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33. Build up IPv6
environment
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34. Router mode
eth2
eth0
IPv6 service
How to build up IPv6 environment by
linux(ubuntu))
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35. Host mode
Direct connection
stateless mode
stateful mode
IPv6 tunnel broker service
connect pppoe
install gogoclient and enjoy service.
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36. Thanks a lot
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