RS/RA, Link local address, global IPv6 address
2021. 11. 26. 17:37
The IPv6 addresses starting with FE in hexadecimals represent link local IPv6 addresses.
Link-local addresses cannot be routed to public networks and limited to the local network.
Link-local addresses are auto-configured (or auto-generated plug-and-play) addresses (Stateless addresses) similar to IPv4 APIPA addresses (169.254.0.0/16).
A link-local address is for use on a single link and should never be routed.
IPv6 Link Local addresses are identified among IPv6 addresses by reserving the left most 64 bits as 1111111010000000 0000000000000000 0000000000000000 0000000000000000 (translates to FE80 in hexadecimals).
IPv6 Link Local addresses are used by devices for communicating with other nodes on the same link. The scope of an IPv6 Link Local address is the local link.
IPv6 Link Local addresses are auto-generated and many international technology leaders generate IPv6 Link Local addresses from MAC Address of the interface.
https://blog.zivaro.com/need-know-link-local-ipv6-addresses
https://xn--3e0bx5euxnjje69i70af08bea817g.xn--3e0b707e/jsp/resources/vsix/icmp.jsp
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