how to convert mac address to ip address

'Presented here is a protocol that allows dynamicĭistribution of the information needed to build tables to RFC 826 - An Ethernet Address Resolution Protocol: the target's hardware address is indeed unknown when the request is sent. 'ARP: This is a message sent to the data link layer broadcast address indicating a network layer address for which the transmitter seeks a corresponding data link layer address.' 'ARP provides a dynamic mapping from an IP address to the corresponding hardware address.' Stevens / TCP/IP Illustrated, Volume 1 - The Protocols: It is /not/ for converting a MAC Address to an IP Address.

I state again, ARP is used to convert an IP Address *to* a MAC Address.

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.Well. 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.reformat to IPv6 notation 5274:f2ff:feb1:a87f.take the mac address: for example 52:74:f2:b1:a8:7f.Here’s the conversion process step by step: 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.

How to convert mac address to ip address