| Table of Contents |
|---|
Overview
IP addresses serve for general host identification purposes in IP networks (RFC 791). Typical (IPv4) address consists of four octets. For proper addressing the router also needs the network mask value, id est which bits of the complete IP address refer to the address of the host, and which - to the address of the network. The network address value is calculated by binary AND operation from a network mask and IP address values. It's also possible to specify an IP address followed by a slash "/" and the number of bits that form the network address.
...
Reserved address range is fc00::/7
Special Purpose Address
| Address | Description |
|---|---|
| Unspecified address (::/128) | Never assigned to an interface or used as a destination address, used only to indicate the absence of an address. Equivalent to IPv4 0.0.0.0 address. |
| loopback address (::1/128) | Used to identify a loopback interface, enabling a node to send packets to itself. It is equivalent to the IPv4 loopback address of 127.0.0.1. |
| 2002::/16 | This prefix is used for 6to4 addressing. Here, an address from the IPv4 network 192.88.99.0/24 is also used. |
| 2001:db8::/32 | Address range reserved for documentation. These should never be seen as source or destionation. |
| 2001:0010::/28 | Orchid fixed term experiment. Should not be seen as source or destination |
| 2001:0002::/48 | Used for benchmarking, should not be seen as source or destination |
| 2001:0000::/32 | Teredo |
Compatibility Address
| Address | Description |
|---|---|
| IPv4 compatible address | used by dual-stack nodes that are communicating with IPv6 over an IPv4 infrastructure. When the IPv4-compatible address is used as an IPv6 destination, IPv6 traffic is automatically encapsulated with an IPv4 header and sent to the destination by using the IPv4 infrastructure. Address is written in following format ::w.x.y.z, where w.x.y.z is the dotted decimal representation of a public IPv4 address. |
| IPv4 mapped address | used to represent an IPv4-only node to an IPv6 node. It is used only for internal representation. The IPv4-mapped address is never used as a source or destination address for an IPv6 packet. The IPv6 protocol does not support the use of IPv4-mapped addresses. Address is written in the following format: ::ffff:w.x.y.z, where w.x.y.z is the dotted-decimal representation of a public IPv4 address. |
Multicast Address
Most important multicast aspects are:
...
Here is the table of reserved IPV6 addresses for multicast:
| Address | Description |
|---|---|
| FF02::1 | The all-nodes address used to reach all nodes on the same link. |
| FF02::2 | The all-routers address used to reach all routers on the same link. |
| FF02::5 | The all-Open Shortest Path First (OSPF) routers address used to reach all OSPF routers on the same link. |
| FF02::6 | The all-OSPF designated routers address used to reach all OSPF designated routers on the same link. |
| FF02::1:FFXX:XXXX | The solicited-node address used in the address resolution process to resolve the IPv6 address of a link-local node to its link-layer address. The last 24 bits (XX:XXXX) of the solicited-node address are the last 24 bits of an IPv6 unicast address. |
The following table is a partial list of IPv6 multicast addresses that are reserved for IPv6 multicasting and registered with the Internet Assigned Numbers Authority (IANA). For complete list of assigned addresses read IANA document.
...