This slide shows IPv6 address details (Global unicast, multicast, link local address, unique local address, loop back addres, unspecified address)

1. IPv6 Address Details
Prepared by Mahmudul Islam

2. IPv6 Address Type
IPv6 Address Type Description
Global Unicast Destined for a single recipient and can be routed on
the public Internet
Multicast Destined for members of a multicast group
Link Local Valid only on a network segment
Unique Local locally global but are not routed over the Internet,
limiting their scope to an organization’s boundary
Loop back The localhost address of a device
Unspecified Does not specify a source address

3. Global Unicast Address
• Addressing start with 2000::/3
• Addressing assigned by IANA
001 Global Routing Prefix Subnet ID Interface ID
3 bits 45 bits 16 bits 64 bits

4. Multicast Address
• Addressing has an FF as the first two hexadecimal digits
1111 1111 Flags Scope Group ID
8 bits 4 bits 4 bits 112 bits

5. Link Local Address
• Addressing start with FE80::/10
• Can communicate on one network segment
• Similar to IPv4 APIPA address (169.254.0.0/16)
• Can be automatically or statically assigned
1111 1110 11 54 Zeros Interface ID
10 bits 54 bits 64 bits

6. Unique Local Address
• Addressing start with FC00::/7
• Can not be routed over public internet
• Similar to IPv4 private address
• If the address is locally assigned, the L bits is set to 1
1111 110 L Global ID Subnet ID Interface ID
7 bits 1 bit 40 bits 16 bits 64 bits

7. • Written as ::1
• Also known as localhost
• Similar to IPv4 127.0.0.1 address
• Can be used to verify IPv6 stack is operating on a device
Loopback Address
127 Zeros 1
127 bits 1 bit

8. • Written as ::
• Used for a client's source address when sending a
Neighbor Solicitation message
• Used for a client's source address when sending a Router
Solicitation message
Unspecified Address
128 Zeros
128 bits