Awareness Objective • IPv6 Address Format & Basic Rules ..., Exercises of Communication

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IPv6 Addressing

Awareness Objective

• IPv6 Address Format & Basic Rules

• Understanding the IPv6 Address

Components

• Understanding & Identifying Various

Types of IPv6 Addresses

1

• The following is an IPv6 address in binary form:

0010000000000001000011011011100000000000000000000010111100111011 0000001010101010000000001111111111111110001010001001110001011010

• The 128-bit address is divided along 16-bit blocks:

0010000000000001 0000110110111000 0000000000000000 0010111100111011 0000001010101010 0000000011111111 1111111000101000 1001110001011010

• Each 16-bit block is converted to hexadecimal – taking 4 bits as one block- and delimited with colons. The result is :

Second 16 bits block is 0000 1101 1011 1000

0 D B 8 Thus, the 8 blocks are represented as :

2001:0DB8:0000:2F3B:02AA:00FF:FE28:9C5A

FROM 128 bit BINARY TO 8 BLOCK OF ‘HEXTETS’

IPv6 Address Capacity

IPv4: 32 bits or 4 bytes long 4.2 billion possible IP addresses

• IPv6: 128 bits or 16 bytes
  • 340 10*^36 possible IP addresses
  • 340 undecillion or 340 trillion trillion trillion
  • 340 lakh lakh lakh crores !!

IPv

2001:0DB8:0000:003B:02AA:00FF:FE28:0C5A

Written in Case Insensitive colon ‘hextet’ notation

2001:0Db8:0000:003B:02aa:00ff:FE28:0C5A

RULE 1

Rule 2

2001:0Db8:0000:003B:02aa:00ff:FE28:0C5A

9/25/2014 8

The leading zeros within each 16-bit block can

be removed. However, each block must have at

least a single digit

2001:0Db8:0000:003B:02aa:00ff:FE28:0C5A

2001:Db8:0:3B:2aa:ff:FE28:C5A

In a URL, it is enclosed in brackets

http://[2001:1:4F3A::206:AE14]

If writing Domain name in the URL, Should use Fully Qualified Domain Names (FQDN)

IPv6 Addresses in URL

AWARENESS OBJECTIVES

• IPv6 Address Format & Basic Rules

• Understanding the IPv6 Address

Components

• Understanding & Identifying Various

Types of IPv6 Addresses

• 9/25/2014

9/25/2014 14

2001:0A3C:5437:ABCD:0:0:0:0/ 64

Prefix Interface ID

IPv6 Interface Identifiers

• Fixed Sixty-four LSB bits of IPv6 address. Guaranteed unique on the subnet
• In IPv4, hosts ID are of variable length depending upon the sub netting scheme whereas in IPv6 Interface ID is of fixed length as 64 bits
• Mapping IEEE 802 48 bit MAC address into 64 bit Interface ID (EUI-64)
• In IPV6, nodes can generate its Interface ID automatically

AWARENESS OBJECTIVES

• IPv6 Address Format & Basic Rules

• Understanding the IPv6 Address

Components

• Understanding & Identifying Various Types

of IPv6 Addresses

IPv6 Address Scope

Link-local : The scope is the local link (nodes on the same subnet)

Site-local : The scope is the site of an organization (private site addressing) – Now Deprecated

Unique – Local : Scope is the organization ; Similar to Private IPv 4 addresses

Global : The scope is global (IPv 6 public addresses)

IPv