![]() There have been a few interesting comments on this post, I encourage you to read them if you want to learn more about this mechanism. prepend the link-local prefix: fe80::5074:f2ff:feb1:a87fĪ converter to do the same operation in reverse is available here.replace first octet with newly calculated one: 5074:f2ff:feb1:a87f.convert octet back to hexadecimal: 01010000 -> 50.convert the first octet from hexadecimal to binary: 52 -> 01010010.Your MAC Address should be in the format: M:M:M:S:S:S. From the upper menu, click Hardware, and look for the MAC Address. In the Network window that just opened, click the Wi-Fi, Ethernet, or Airport icon on the left. reformat to IPv6 notation 5274:f2ff:feb1:a87f In System Preferences, click the View menu and select Network.take the mac address: for example 52:74:f2:b1:a8:7f.Following image shows a capture of ICMP packet (ping command) with a destination IPv4 address as Class D multicast IPv4 addresses 224.0.0.5. Here’s the conversion process step by step: The IPv4 multicast MAC address for IPv4 multicast addresses 224.0.0.5 is 01:00:5e:00:00:05. This link-local IPv6 is infered from the NIC’s mac address.Ī mac address is 48 bits, an IPv6 address is 128 bits. Instead of getting an address via DHCP, a NIC will hop on the network with a link-local IPv6 address and with this will have to ability to do further configuration automatically (soliciting neighbors, router, et cetera). Link-local IPv6 addresses are used as part of the IPv6 network auto-configuration process.
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