– Extended Unique Identify
– intended to automatically generate an IPv6 address
A quick reminder:
One piece of equipment has two IPv6 addresses:
– a Link-Local address for the LAN part
– a Global Address address for browsing the Internet
This method uses the rule EUI-64 (Extended Unique Identify). to automatically generate the "Interface-ID" part like this:
Step 1: Cut the MAC address of the interface in question in half.
Step 2: Inserts the FF:FE code between the two parties.
Step 3: Reverses the 7th bit of "Interface-ID."
The "Interface-ID" part generated by the EUI-64 rule is: E23F:49FF:FE45:9D7B
EUI-64 for Link-Local
R1 (config) - FastEthernet interface 0/0 R1 (config-if) - ipv6 enable
This command allows the IPv6 protocol to be activated on an interface.
Thanks to it, our router will start to generate an IPv6 address of the type Link-local with the EUI-64.
R1 show ipv6 interface FastEthernet 0/0 IPv6 is enabled, link-local address is FE80::E23F:49FF:FE45:9D7B
EUI-64 for Global address
Router (config-if) ipv6 address 2001:DB8:0:1:/64 eui-64
This command will allow us to say to our interface:
This is the network you belong to, after you choose an address.
R1 show ipv6 interface FastEthernet 0/0 FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::E23F:49FF:FE45:9D7B No Virtual link-local address:00: Global unicast address: 2001:DB8:0:1::E23F:49FF:FE45:9D7B, subnet is 2001:DB8:0:1::/64 [EUI]