A faixa de endereços IPv4 169.254.0.0/16
é Link-Local e não pode ser roteada.
Consulte RFC 6890, Registros de endereços IP para fins especiais :
+----------------------+----------------+ | Attribute | Value | +----------------------+----------------+ | Address Block | 169.254.0.0/16 | | Name | Link Local | | RFC | [RFC3927] | | Allocation Date | May 2005 | | Termination Date | N/A | | Source | True | | Destination | True | | Forwardable | False | | Global | False | | Reserved-by-Protocol | True | +----------------------+----------------+ Table 5: Link Local
Além disso, os endereços nesse intervalo não podem ser estaticamente atribuídos porque eles não podem executar a detecção de endereço duplicado e alterar o endereçamento se uma duplicata for encontrada.
Consulte RFC 3927, Configuração dinâmica de endereços locais de links IPv4 :
1.6. Alternate Use Prohibition
Note that addresses in the 169.254/16 prefix SHOULD NOT be configured manually or by a DHCP server. Manual or DHCP configuration may cause a host to use an address in the 169.254/16 prefix without following the special rules regarding duplicate detection and automatic configuration that pertain to addresses in this prefix. While the DHCP specification [RFC2131] indicates that a DHCP client SHOULD probe a newly received address with ARP, this is not mandatory. Similarly, while the DHCP specification 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, IPv4 Link-Local 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 IPv4 Link-Local address.
Administrators wishing to configure their own local addresses (using manual configuration, a DHCP server, or any other mechanism not described in this document) should use one of the existing private address prefixes [RFC1918], not the 169.254/16 prefix.