Which of the following is NOT a function of the IPv6 unicast-routing command?

In the context of IPv6 routing, the command to enable IPv6 unicast routing primarily facilitates the handling of IPv6 packets across a network. It has specific functions that are critical for routing in dual-stack scenarios, where both IPv4 and IPv6 can coexist.

The enabling of ICMPv6 Router Advertisement messages is important for the operation of stateless address autoconfiguration and neighbor discovery in IPv6. This is a critical aspect of IPv6 networking, as it helps devices on the network to automatically configure their addresses without needing manual configuration. Therefore, this is a function supported by the unicast-routing command.

Allowing unicast packets to be routed is a fundamental function of enabling IPv6 unicast routing. This command directly impacts how packets are handled within the network, facilitating proper routing based on the IPv6 addressing scheme.

Connecting to dual-stack networks is also supported by the command since dual-stack networks are designed to handle both IPv4 and IPv6 traffic. Enabling IPv6 unicast routing allows the routing of IPv6 packets alongside IPv4.

Disabling all IPv4 routing, however, is not a function of the IPv6 unicast-routing command. This command is designed to enable IPv6 routing functionality without affecting the existing IPv4 configuration