#48 bit mac address ipv6 convert 64 Bit#
#48 bit mac address ipv6 convert 64 bits#

Unique Local are meant to be used inside an internal network. they do not require a DHCP server.Ī link local address is required on every IP6 interface even if no routing is present. Link Local addresses are self assigned i.e. They are restricted to a link and are not routed on the Internal network or the Internet. It is equivalent to the IPv4 address 169.254.0.0/16 which is allocated on an IPv4 network when no DHCP server is found.

These are meant to be used inside an internal network, and again they are not routed on the Internet. IPv6 also has two Internal address types. These addresses are not routed on the Internet and are reserved for internal networks. See Global Address assignments Internal Addresses- Link Local and Unique Local The Internet authorities allocate address blocks to ISPs who in turn allocate them to their customers. These addresses are known as global Unicast addresses and are the equivalent of the public addresses of IPv4 networks. Global addresses are routable on the internet and start with 2001: Link Local – Scope network link- Not Routed internally or externally.Unique Local - Scope Internal Network or VPN internally routable, but Not routed on Internet.Global Unicast Address –Scope Internet- routed on Internet.The upper 48 bits are used for the global network addresses and are for routing over the internet.

#48 bit mac address ipv6 convert 64 bits#

If we look at the upper 64 bits in more detail we can see that it is split into 2 blocks of 48 and 16 bits respectively the lower 16 bits are used for subnets on an internal networks, and are controlled by a network administrator. See this Wiki description for exact details. The lower 64 bits identify the address of the interface or node, and is derived from the actual physical or MAC address using IEEE’s Extended Unique Identifier (EUI-64) format.

#48 bit mac address ipv6 convert 64 Bit#

The address is split into 2 64 bit segments the top 64 bits is the network part and the lower 64 bits the node part: The first step is to split the address into two parts. This was done initially using Address classes and later using subnet masking. In IPv4 an address is split into two components a network component and a node component. The main technique being to omit repetitive 0’s as shown in the example above. Note: Because of the length of IPv6 addresses various shortening techniques are employed. The groups are written with a : (colon) as a separator. These numbers are grouped in 4’s giving 8 groups or blocks. See Binary numbers explainedīecause an hexadecimal number uses 4 bits this means that an IPv6 address consists of 32 hexadecimal numbers. IPv6 addresses are written using hexadecimal, as opposed to dotted decimal in IPv4.

Therefore it will help if you are already familiar with IPv4 -See IPv4 Addressing and classes for Beginners IPv6 addressesĪn Ipv6 address uses 128 bits as opposed to 32 bits in IPv4. In this tutorial I want to take a quick look at IPv6 addresses, and how they relate to IPv4 addresses. įor small business/home and home office networks it is likely to be many years before IPV6 becomes an issue.Īll modern computers and mobile phones support both IPv4 and IPv6, and if you look at your device IP addresses you will probably see both. However adoption rates are increasing rapidly and IPv6 traffic crossed the 10% threshold in February 2016 ( wiki). IPV6 has been developed to replace IPV4 which is running out of addresses.Īlthough it has been around almost 10 years it is still not widely deployed and supported.