This is almost 340 undecilion available addresses, nearly unlimited! So, almost 2 128 available addresses can be created with this new IP version. The new and the next generation version of IP, IPv6 has 128 bit address space. It was the foundation of Voice Over IP (VoIP). It was providing effective data transfer on specific frequencies. It is mainly developed for streaming video and voice as experimental protocol for research and development. So, what about IPv5 after IPv4? IPv5 has named as Internet Stream Protocol (ST) that has never become an official standard protocol. We can say that, IPv6 is the new Internet Protocol version that we will use alone or beside IPv4 on our network devices anymore. This new Internet Protocol version is IPv6 (Internet Protocol version 6). For the new technologies, more IP addresess needed and for this need a new IP version has developed.
As you know, IPv4 Addresses were limited and exhaused shortly. A device typically uses FE80::/64 as the prefix/prefix-length, followed by the Interface ID.IPv6 Address is the new generation IP address that is mainly developed to overcome IPv4 exhaust and its limitations.
CONVERT MAC ADDRESS TO IPV6 LINK LOCAL WINDOWS
Windows XP and previous Windows operating systems used EUI-64.Īn easy way to identify that an address was more than likely created using EUI-64 is the FFFE located in the middle of the Interface ID, as shown in Figure 2.Īfter the Interface ID is established, either through the EUI-64 process or through random generation, it can be combined with an IPv6 prefix to create a global unicast address or a link-local address: For example, beginning with Windows Vista, Windows uses a randomly generated Interface ID instead of one created with EUI-64. Due to these concerns, a randomly generated Interface ID may be used instead.ĭepending upon the operating system, a device may use a randomly generated Interface ID instead of using the MAC address and the EUI-64 process. They are concerned that their packets can be traced to the actual physical computer. However, this has caused privacy concerns among many users. It also allows network administrators to easily track an IPv6 address to an end-device using the unique MAC address. The advantage of EUI-64 is the Ethernet MAC address can be used to determine the Interface ID. Note: The use of the U/L bit and the reasons for reversing its value are discussed in RFC 5342. The result is an EUI-64 generated Interface ID of FE99:47FF:FE75:CEE0. In this example the 0 in bit 7 is changed to a 1. Step 3: Convert the first 2 hexadecimal values of the OUI to binary and flip the U/L bit (bit 7). Step 2: Insert the hexadecimal value FFFE, which in binary is: 1111 1111 1111 1110. Step 1: Divide the MAC address between the OUI and device identifier. The EUI-64 process is illustrated in Figure 1, using R1’s GigabitEthernet MAC address of FC99:4775:CEE0.