IPv6 Subnetting and Address Allocation

As we all know that IPv6 unicast address consist of 16 bits of field known as subnet identifier field. This field provides the facility to the organizations to configure up to 65535 subnets. The addresses of IPv6 offer and supply very ordered and controlled addressing schemes. It properly notifies the user about the restrictions and troubles linked with any type of connection.

Firstly, the very first three bits in the IPv6 address are mostly used to set and position the prefix. Users should keep in mind that all the addresses with the values which are binary in form like 001 comes in the category of global addresses. These global addresses consist of the 64 bit field. The field is generated with the help of MAC address whose length is 48 bits and FFFE whose length is 16 bits. Collectively this entire scheme is known as extended universal identifier. In other words, in the IPv6 address, 64 bits stands for the unique interface while the 16 bits symbolizes the subnet identifier.

Internet assigned numbers authority usually allocate and assign the address space. IANA performs the function of providing every kind of registries to the organizations. The 16th fraction of the address space has always been given to the registry. Once the address space has been created, it can then be divided and segmented into smaller subnets.

Hence, IPv6 totally and completely introduces an addressing scheme that illustrates and explains how hosts can be addresses in the best mode. Previously, host only had a single solo IP address but now in the time period of IPv6 wide range of addresses have been assigned and allocated to the hose. These addresses include unicast and multi-cast modes. One more thing that the users will surely be happy to know that IPv6 does not hold and carry broadcast!