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In computer networking, a link-local address is a network address that is valid only for communications within the subnetwork that the host is connected to. Link-local addresses are most often assigned automatically with a process known as stateless address autoconfiguration or link-local address autoconfiguration, also known as automatic private IP addressing or auto-IP.
Link-local addresses are not guaranteed to be unique beyond their network segment. Therefore, routers do not forward packets with link-local source or destination addresses.
IPv4 link-local addresses are assigned from address block 169.254.0.0/16. In IPv6, they are assigned from the block fe80::/10.
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