When using an IPv6 link-local address to connect to a host, a zone index must be added to the address so that the packets can be sent out on the correct interface.In IPv6, addresses may be assigned by stateless (automatic) or stateful (manual) mechanisms.The service associated with your Horizontal Dock will be listed as Thunderbolt Ethernet Slot followed by a number.
It is okay if it is a little different than what you see below.
Once the dock's network service has been added to your list of possible network connections, you have the option to change the order in which your Mac Book will use this service.
For Internet Protocol (IP) networks, they are assigned most often using stateless address autoconfiguration.
In IPv4, they are normally only used to assign IP addresses to network interfaces when no external, stateful mechanism of address configuration exists, such as the Dynamic Host Configuration Protocol (DHCP), or when another primary configuration method has failed.
When a globally routable or a private address becomes available after a link-local address has been assigned, the use of the new address should generally be preferred to the link-local address for new connections but communication via the link-local address is still possible.
Of the 64 bits of a link-local addresses' network component, the most significant 10 bits (1111111010) correspond to the IANA-reserved "global routing prefix" for link-local addresses, while the "subnet ID" (the remaining 54 bits) is zero.In IPv6, link-local addresses are mandatory and required for the internal functioning of various protocol components.Automatic address configuration of link-local addresses is often non-deterministic as the resulting address cannot be predicted.Link-local addresses are not guaranteed to be unique beyond their network segment, therefore routers do not forward packets with link-local addresses.Link-local addresses for IPv4 are defined in the address block Link-local addresses may be assigned manually by an administrator or by automatic operating system procedures; this process is also known as self-assigned IP addressing.If a reply is received to the ARP, it indicates the candidate IP address is already in use; a new random candidate IP address is then created and the process repeated.The process ends when there is no reply to the ARP, indicating the candidate IP address is available.In a computer network, a link-local address is a network address that is valid only for communications within the network segment or the broadcast domain that the host is connected to.Link-local addresses are most often assigned automatically through a process known as stateless address autoconfiguration or link-local address autoconfiguration.Stateless address autoconfiguration is performed as a component of the Neighbor Discovery Protocol (NDP), as specified in RFC 4862.The address is formed from its routing prefix and the MAC address of the interface.