EUI-64 is the standard used.
What is EUI-64 used for?
EUI-64 (Extended Unique Identifier) is a method we can use to automatically configure IPv6 host addresses. An IPv6 device will use the MAC address of its interface to generate a unique 64-bit interface ID.
When converted to EUI-64 standard how many bits are inserted into the existing OS-assigned MAC address?
The IPv6 EUI-64 format address is obtained through the 48-bit MAC address. The MAC address is first separated into two 24-bits, with one being OUI (Organizationally Unique Identifier) and the other being NIC-specific. The 16-bit 0xFFFE is then inserted between these two 24-bits for the 64-bit EUI address.
Does EUI-64 improve security?
The IID used to be based on an encoding of the device's hardware MAC address, known as EUI-64. It subsequently became clear that EUI-64 should be considered harmful to privacy because it exposes hardware identifiers at the network layer.
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