Which action must be taken to assign a global unicast IPv6 address on an interface that is derived from the MAC address of that interface?
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A. B. C. D.C.
To assign a global unicast IPv6 address on an interface that is derived from the MAC address of that interface, we can use the EUI-64 process. The EUI-64 process uses the MAC address of an interface to automatically generate an interface identifier (IID) that can be used as the host portion of a global unicast IPv6 address.
To accomplish this, we need to follow these steps:
Enable IPv6 on the interface using the "ipv6 enable" command.
Configure the IPv6 address with the "ipv6 address" command, including the prefix and the interface identifier. For example, "ipv6 address 2001:DB8:0:1::/64 eui-64".
Verify the IPv6 address configuration using the "show ipv6 interface" command.
Now, let's look at the options provided in the question:
A. Explicitly assign a link-local address: A link-local address is required on every IPv6-enabled interface, but it is not necessary to assign a link-local address to assign a global unicast address using EUI-64.
B. Disable the EUI-64 bit process: This option would prevent the automatic generation of the interface identifier from the MAC address, which would require us to manually configure the interface identifier. This option is not necessary to assign a global unicast IPv6 address using EUI-64.
C. Enable SLAAC on an interface: SLAAC (Stateless Address Autoconfiguration) allows hosts to automatically configure their IPv6 addresses using router advertisements. While SLAAC can be used to assign a global unicast IPv6 address, it does not require the use of EUI-64.
D. Configure a stateful DHCPv6 server on the network: DHCPv6 can be used to assign IPv6 addresses to hosts, but it is not necessary to assign a global unicast IPv6 address using EUI-64.
Therefore, the correct answer is B. Disable the EUI-64 bit process is not required to assign a global unicast IPv6 address using EUI-64, which is the process that automatically generates an interface identifier from the MAC address.