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What draft-ietf-zeroconf-IPv4-Linklocal-08 Says Section 1.6: “While [RFC2131] indicates that a DHCP client SHOULD probe a newly received address with ARP, this is not mandatory. Similarly, while [RFC2131] recommends that a DHCP server SHOULD probe an address using an ICMP Echo Request before allocating it, this is also not mandatory, and even if the server does this, Link-Local IPv4 addresses are not routable, so a DHCP server not directly connected to a link cannot detect whether a host on that link is already using the desired Link-Local IPv4 address.” |