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What method is used to embed the MAC address of a NIC into an IPv6 address?
EUI-64
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.
Do I have an IPv6 address?
Now type ipconfig and press Enter. You’ll see your IPv4 address in the list and maybe one or more IPv6 addresses. This will show your public IPv4 and – if it exists – IPv6 address. If you have both, it means that you can access all websites no matter which IP version they use.
Why does OS X generate two IPv6 addresses?
OS X, as of Mountain Lion, generates two IPv6 addresses, an EUI-64 address when the interface is first brought up and a privacy or temporary address which is the one exposed to the Internet. The reason we keep the EUI-64 address is to provide a stable address for local administrators and, for example, SSH connections.
Where do I find the IPv6 address on my Mac?
If your Mac detects that your ISP and router are offering IPv6 service, (through a router notification called an “advertisement,”) you’ll see a single address there. However, if you dig a little deeper, System Preferences -> Network -> Advanced -> TCP/IP, you’ll see two IPv6 addresses.
How to print MAC address in shell script?
If one of the indented lines contains inet addr: the latest interface name and MAC address should be printed. Note that multiple interfaces could meet your criteria. Then, the script will print multiple lines. (You can add ; exit just before the final closing brace if you always only want to print the first match.)
Can a device get its own IPv6 address?
It might be self-assigned or it might be assigned to the device. A device can get away with self-assigning its own IPv6 address because of the vast, and I mean vast, number of IPv6 addresses available: 2 128 = 3.4 x 10 38.