Which command is used to configure an IPv6 address on an interface?

The command used to configure an IPv6 address on an interface is formulated as "ipv6 address address/prefix-length". This command is part of the syntax used in Cisco devices to enable and assign an IPv6 address to a specific interface.

When configuring a network interface, it’s essential to specify both the IPv6 address and the associated prefix length (which indicates how many bits in the address represent the network part). This command must be issued in the interface configuration mode, effectively linking the address to that specific interface.

This command structure follows the convention used in Cisco IOS, wherein the "ipv6 address" portion specifies that an IPv6 address configuration is being initiated. Understanding this syntax is crucial for CCNA candidates, as configuring IPv6 is an important aspect of network design and implementation in modern networks.