Wait SLAACs aren't globally routable? I thought the whole idea behind IPv6 was t...

throw0101d · on Jan 23, 2024

> Wait SLAACs aren't globally routable?

It is not the host-component of IPv6 that determines routability, it is the prefix.

If you have a link-local prefix (fe80::/10) then it is not global, if it is a private prefix (fc00::/7) then it also may not be global; if it is part of IANA's unicast allocation (2000::/3) it is global (firewall permitting).

dijit · on Jan 23, 2024

There's an education here that unfortunately I don't have the time to give you.

SLAAC is the replacement for DHCP, it provides a local prefix address (fe80::) and optionally (and, crucially: additionally) provides a publicly routable IP if there's a public prefix available.

You can think of the subject being split into two components:

As a base: You will get a local IP

On top: you get DNS/Public routing.

Here's a bit more about how it works: https://www.networkacademy.io/ccna/ipv6/stateless-address-au...