You can learn how to configure and troubleshoot IP addressing, subnetting, and routing protocols in a network. 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. If you are preparing for the CCNA 1 v7 exam, you may want to check out this webpage that provides the full answers for the modules 11 - 13: IP Addressing Exam. 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.That is valid for IPv4, but IPv6 has link local addresses for each device inherited from NIC MAC addresses, note this: inet6 addr: fe80::a00:27ff:fe80:e2be/64 Scope:Link. convert octet back to hexadecimal: 01010000 -> 50 As youve mentioned, you dont have IP addresses in this network.Here’s the conversion process step by step: take the mac address: for example 52:74:f2:b1:a8:7f. A mac address is 48 bits, an IPv6 address is 128 bits. invert the bit at index 6 (counting from 0): 01010010 -> 01010000 This link-local IPv6 is infered from the NIC’s mac address.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). One of the ways I learn a new scripting language is to implement a subroutine to convert a network MAC addr into the IPv6 link-local address, as described in RFC 4862. Link-local IPv6 addresses are used as part of the IPv6 network auto-configuration process.
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