So, the interface ID will be 02BB:CCFF:FEDD:1122. Next, the router will insert FFFE in the middle of the address listed above: This will result in the following hexadecimal address:

Well, the router will first flip the seventh bit from 0 to 1. Invert the seventh bit of the interface ID.įor example, if the MAC address of a nework card is 00:BB:CC:DD:11:22, the interface ID would be 02BBCCFFFEDD1122. Insert FFFE in between the two, making the interface ID.ģ. Split the MAC address in two halves (6 hex digits each).Ģ. Octets or segments, or a combination of both, make up Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) addresses. Here are the rules that a router uses to create the interface ID:ġ. The interface ID created this way is known as the modified extended unique identifier 64 (EUI-64). Converting a known mac-address into a fe80::-IPv6-address is also useful to connect to a specific device with a known physical address. from a broadcast ping) into a mac address. Also, the 7th bit in the first byte is flipped to a binary 1. It is often helpful to convert IPv6 link local addresses (e.g.

Convert the two hexadecimal digits at the left end. An interface ID is created by inserting the hex number FFFE in the middle of the MAC address of the network card. Split the MAC address into two parts and insert FF-FE in the middle. The second part of an IPv6 unicast address (used to identify a host’s network interface) is usually a 64-bit interface identifier.

How to convert mac address to ipv6