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  1. Probably little mistake on last picture.
    On picture above is mac adress starting with CC0A and on the last picture is IPv6 address with CE0A.
    Anyway, thanks for great lesson.

  2. Hi Towdie,

    In reality the router does one more thing when creating the IPv6 address using EUI-64. The MAC address is chopped in two pieces but it will also “flip” the 7th bit. When it’s a 0 it will make it a 1 and the other way around. Here’s an example for the MAC address I used in this tutorial:


    Each hexadecimal character represents 4 binary bits:

    C = 1100
    C = 1100
    0 = 0000
    A = 1010

    Let’s put “CC” in binary behind each other:


    EUI-64 will flip the 7th bit of this address so it will become:


    Let’s calculate that back to hexadecim

    ... Continue reading in our forum

  3. Hi Jose,

    I’ve heard this one before but it doesn’t make much sense to me. This is from RFC 4291:

    2.5.3.  The Loopback Address
       The unicast address 0:0:0:0:0:0:0:1 is called the loopback address.
       It may be used by a node to send an IPv6 packet to itself.  It must
       not be assigned to any physical interface.  It is treated as having
       Link-Local scope, and may be thought of as the Link-Local unicast
       address of a virtual interface (typically called the "loopback
       interface") to an imaginary link that goes nowhere.
       The loopback address mu
    ... Continue reading in our forum

  4. Rene, just to be clear, they aren’t the same right?
    2001:41f0:4060:10::/64 and 2001:41f0:4060:A::/64 ?

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