IPV6 planning

Baldur Norddahl baldur.norddahl at gmail.com
Tue Mar 8 04:23:01 UTC 2016

On 8 March 2016 at 01:01, Alarig Le Lay <alarig at swordarmor.fr> wrote:

> It’s not exactly specific to Windows, dhcpcd use a something like that
> (my IPv6 is 2a00:5884:8316:2653:fd40:d47d:556f:c426). And at least,
> there is a RFC related to that, https://tools.ietf.org/html/rfc7217.

It appears that RFC 7217 does not actually demand a 64 bit interface
identifier. One could therefore do a non-64 bit RFC 7217 SLAAC on operating
systems that support that.

"We note that [RFC4291] requires that the Interface IDs of all
          unicast addresses (except those that start with the binary
          value 000) be 64 bits long.  However, the method discussed in
          this document could be employed for generating Interface IDs
          of any arbitrary length, albeit at the expense of reduced
          entropy (when employing Interface IDs smaller than 64 bits)."



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