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ip V6

Why ip V6

ip V4 AddressingIp v4

:: 32-bits :::: written in dotted decimal ::

:: 192.168.1.1 ::

ip V6 AddressingIp v6

:: 128-bits :::: written in hexidecimal ::

:: 2001:0000:0001:0002:0000:0000:0000:ABCD ::

Simplifying an IPv6 Address:: 2001:0000:0001:0002:0000:0000:0000:ABCD

:1: 2001:0:1:2:0:0:0:ABCD True

:2: 2001::1:2:0:0:0:ABCD True

:3: 2001:0:1:2::ABCD True

:4: 2001::1:2::ABCD False

Conventions for Writing IPv6 Prefixes:1:

2000:1234:5678:9ABC:1234:5678:9ABC:1111/64:2:

2000:1234:5678:9ABC:0000:0000:0000:0000/64:3: 2000:1234:5678:9ABC::/64

:4: 2000:1234:5678:9A00::/56

IANAAssigns 2340::/12

ARIN (RIR)Owns

2340::/12

Assigns

2340:1111/32

NA-ISPICompany1 Assigns2340:1111:AAAA/48

Assigning IPv6 Global Unicast AddressesStatef

ulDHCP Statel

essautoco

nfig

Static config

Static config with

EUI-64

Stateless

autoconfig

Static config

Static config with

EUI-64

=> Like DHCP-V4=>Track address => Using Multicast (FF00::/8)

ÞNetwork discovery protocol (NDP)

Perfix and default routeÞUsing EUI-64ÞStateless DHCP( DNS fro

ipv6 )

EUI-64

EUI-64 sampleMAC Address ::: 0034:5678:9ABC

interface ID ::: 0234:56FF:FE78:9ABC

stateless autoconfiguration

1:: The host creates a link-local address 2:: It sends an NS (Neighbor Solicitation) message to its link-local address out the interface.3:: If there is no reply, DAD (Duplicate Address Discovery) declares the address unique.4:: If the host doesn’t receive an RA (Router Advertisements) , it sends an RS.5:: A router on the subnet sends an RA, listing its interface prefix.6:: The host uses that prefix and the interface MAC address to create its IPv6 address

ip V6 Addressing Type

unicast Multic

ast

anycast

UnicastLink local unicas

tglobal unicas

t

Unique

Local unicas

t

UNIQUE LOCAL UNICAST8bits 40 bits 16bits 64 bits

‘FD’ + Global ID + Subnet + Interface ID

:: should not be advertised into the Internet ::

LINK LOCAL UNICAST10bits 54 bits 64 bits

‘FE80’ + All 0s + Interface ID

:: help solve some chicken-and-egg problems ::

What is that ::1/128 ??Loopback address

Multicast AddressesAll IPv6 nodes on the link

-------------------------------------FF02::1All IPv6 routers on the link------------------------------------

FF02::2DHCP relay agents --------------------------------------------

FF02:1:2DHCP servers -------------------------------------------------

FF05::1:3All NTP servers -----------------------------------------------

FF05::101

:: Larger address space :: :: No more need for NAT ::

:: Simpler header for increased router efficiency :::: No more broadcasts ::

:: Stateless autoconfiguration :: :: Built-in support for Mobile IP ::

:: Built-in support for IPsec security:::: Easy IP address renumbering ::

:: Capability to have multiple addresses per interface :: :: Routers create link-local addresses for use by IGPs ::

:::::NOTICE:::::Routers that straddle the IPv4 and IPv6 worlds encapsulate IPv6 traffic inside IPv4 packets !!!

CISCO CC

NACCAR

CCIE

CCDP

CCNProut

e

CCNP

switch

THE END