IPV6 addressing

ICMPv6 Message Types 

Message Type	ICMPv6 Type	Description
Router Solicitation	133	Sent by IPv6 hosts to the link-local scope allrouters multicast address (FF02::2) to discover IPv6 routers present on the local link.
Router Advertisement	134	Sent periodically by IPv6 routers to the link-local scope all-nodes multicast address (FF02::1), or sent to the unicast address of a host in response to receiving a Router Solicitation message from that host. (Windows Vista and later versions use multicast for optimization.) Router Advertisement messages provide hosts with the information needed to determine link prefixes, link maximum transmission unit (MTU), whether to use DHCPv6 for address autoconfiguration, and lifetime for autoconfigured addresses.
Neighbor Solicitation	135	Sent by IPv6 nodes to the solicited-node multicast address of a host to discover the link-layer address of an IPv6 node, or sent to the unicast address of the host to verify the reachability of the host.
Neighbor Advertisement	136	Sent by an IPv6 node to the unicast address of a host in response to receiving a Neighbor Solicitation message from the host, or sent to the linklocal scope all-nodes multicast address (FF02::1) to inform neighboring nodes of changes to the host's link-layer addresses.
Redirect	137	Sent by an IPv6 router to the unicast address of a host to inform the host of a more optimal first-hop address for a specific destination.

IPV6 addressing

Publish	Type	Met	Prefix	Idx	Gateway/Interface Name
No	Manual	256	::1/128	1	Loopback Pseudo-Interface 1
No	Manual	256	fe80::/64	15	Teredo Tunneling Pseudo-Interface
No	Manual	256	fe80::/64	12	Local Area Connection
No	Manual	256	fe80::100:7f:fffe/128	15	Teredo Tunneling Pseudo-Interface
No	Manual	256	fe80::5efe:172.16.11.131/128	14	isatap.{9D607D7D-0703-4E67-82ED-9A8206377C5C}
No	Manual	256	fe80::5da9:fa1d:2575:c766/128	12	Local Area Connection
No	Manual	256	ff00::/8	1	Loopback Pseudo-Interface 1
No	Manual	256	ff00::/8	15	Teredo Tunneling Pseudo- Interface
No	Manual	256	ff00::/8	12	Local Area Connection

IPv4 vs. IPv6 Addressing

 IPv4 vs. IPv6 Addressing

Feature	IPv4	IPv6
Number of bits (bytes)	32 (4)	128 (16)
Expressed form	Dotted-decimal	Colon-hexadecimal
Variable-length subnets	Yes	No
Public addresses	Yes	Yes (global addresses)
Private addresses	Yes (RFC 1918 addresses)	Yes (unique local addresses)
Autoconfigured addresses for the local link	Yes (APIPA)	Yes (link-local addresses)
Support for address classes	Yes, but deprecated by CIDR	No
Broadcast addresses	Yes	Multicast used instead
Subnet mask	Required	Implicit 64-bit address prefix length for addresses assigned to interfaces

IPV6 addressing

Address Type	High-Order Bits	Address Prefix
Global unicast	001	2000::/3
Link-local unicast	1111 1110 10	FE80::/64
Unique local unicast	1111 1101	FD00::/8
Multicast	1111 1111	FF00::/8

Function	Representation
Unspecified address (no address)	::
Loopback address	::1