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Why ip V6

ip V4 Addressing Ip v4 :: 32-bits :: :: written in dotted decimal :: :: ::

ip V6 Addressing Ip 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

IANA Assigns 2340::/12 ARIN (RIR) Owns 2340::/12 Assigns 2340:1111/32 NA-ISPI Company1 Assigns 2340:1111:AAAA/48

Assigning IPv6 Global Unicast Addresses Stateful DHCP Stateless autoconfig 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)  Network discovery protocol (NDP) Perfix and default route  Using EUI-64  Stateless DHCP( DNS fro ipv6 )

EUI-64

EUI-64 sample MAC 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 Multicast anycast

Unicast Link local unicast global unicast Unique Local unicast

UNIQUE LOCAL UNICAST 8bits 40 bits 16bits 64 bits ‘FD’ + Global ID + Subnet + Interface ID :: should not be advertised into the Internet ::

LINK LOCAL UNICAST 10bits 54 bits 64 bits ‘FE80’ + All 0s + Interface ID :: help solve some chicken-and-egg problems ::

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

Multicast Addresses All IPv6 nodes on the link FF02::1 All IPv6 routers on the link FF02::2 DHCP relay agents FF02:1:2 DHCP servers FF05::1:3 All 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 CCNA CCAR CCIECCDP CCNP route CCNP switch

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