![mac address to ipv6 converter mac address to ipv6 converter](https://www.osttopstapp.com/images/olmconverter.png)
In practice, this is a relatively minor consideration most of the time because hardware doesn’t change that often-this is something that typically occurs in the scope of years, not hours or days. One disadvantage of EUI-64 is that tying the hardware address to the IP address means that if the hardware address changes, the IP address needs to change as well. Using EUI-64 makes this simpler because seeing the IP address of a device indicates immediately what the MAC address is and vice versa. Troubleshooting: When troubleshooting devices, administrators must often switch back and forth between working with IP addresses and hardware addresses.Address harmonization: Administrators no longer must keep track of two separate, unrelated addresses for each device.Support for autoconfiguration: It is easy to generate an appropriate globally routable local address from any hardware device using its hardware address and a process such as SLAAC.More specifically, having device hardware addresses and IPv6 addresses directly linked provides value in the following areas: The benefits of EUI-64 generally relate to practical considerations: simplicity and administrative efficiency. Once again, if you do the math, you can see that if you apply the EUI-64 process to the 2001:ABCD:1234:5678::/64 prefix along with the MAC address of the particular interface, the result is the IPv6 address shown above. The resulting IPv6 global unicast address has become: Note that the link-local address that we previously manually assigned appears in the output of the IPv6 information of this interface. Take a look at this series of commands and their results. On a Cisco IOS device, as soon as you enable the IPv6 capability on an interface, the device will automatically generate a link-local address using the EUI-64 process by default. Link-local addresses are of the form FE80::/10. Link-local addresses, as the name suggests, have only local significance, so they are never routed. Remember that the link-local IPv6 address is an IPv6 address that is automatically generated and assigned to an active IPv6 interface. The first scenario involves generating a link-local IPv6 address on the interface of a Cisco router. We’ll examine two particular cases that we often see on Cisco IOS devices. Let’s take a look at how EUI-64 actually operates on a real device.
![mac address to ipv6 converter mac address to ipv6 converter](https://lemppics.lemp.io/how_to_convert_mac_address_to_an_ipv_interface_id.png)
Real-world example of EUI-64 configuration It is used to differentiate individual devices or interfaces within the same network or subnet. The interface identifier created via the EUI-64 process serves as the device-unique portion of the address.
![mac address to ipv6 converter mac address to ipv6 converter](https://cdn.networkacademy.io/sites/default/files/inline-images/ipv6-allocation-example.png)
EUI-64 is used to map the MAC address into a 64-bit EUI-64 interface identifier.The MAC address comes from the hardware device.The leftmost 64 bits of the address come from the network prefix, which defines the network portion of the address.Now that we have seen how EUI-64 mapping works, let’s pause for a bit of a recap and see how the various pieces fit together in IPv6: