![]() Now we have this address in hex: hex 02BBCCDD1122 Well, first we need to flip the seventh bit from 0 to 1. When this is done, the interface ID is commonly called the modified extended unique identifier 64 (EUI-64).įor example, if the MAC address of a network card is 00:BB:CC:DD:11:22 the interface ID would be 02BBCCFFFEDD1122. Also, the 7th Bit in the first byte is flipped to a binary 1 (if the 7th bit is set to 0 it means that the MAC address is a burned-in MAC address). A 64-bit interface ID is created by inserting the hex value of FFFE in the middle of the MAC address of the network card. ![]() ![]() The second part of an IPv6 unicast or anycast address is typically a 64-bit interface identifier used to identify a host’s network interface.
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