We only care about the last 23 bits of your IP address so I removed the first 9 bits, that gives us: 1000000 00000000 00000001. 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. Here’s how to figure out what MAC address your IP address maps to: We convert your IP address to binary: decimal: 239.192.0.1 binary: 11101111 11000000 00000000 00000001. 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.Because there are 28 significant bits in an IP host group address, more than one host group address may map to the same Ethernet multicast. convert octet back to hexadecimal: 01010000 -> 50 An IP host group address is mapped to an Ethernet multicast address by placing the low-order 23-bits of the IP address into the low-order 23 bits of the Ethernet multicast address 01-00-5E-00-00-00 (hex).convert the first octet from hexadecimal to binary: 52 -> 01010010. ![]()
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