IPv6, ULAs and FreeBSD
Mark Tinka
mark.tinka at seacom.mu
Fri May 27 05:53:30 UTC 2016
On 26/May/16 21:36, Niklaas Baudet von Gersdorff wrote:
> Here lies the first problem. It seems that it's not legitimate to assign
> /96 subnets when using unique local addresses (ULAs). I was right
> getting some /48 subnet for my local IPv6 network; some easy way to get
> one generated randomly is http://unique-local-ipv6.com/ . But instead of
> assigning /96 subnets to each host, you must assign /64 subnets. I guess
> (but I am not sure because I have not found any reference that mentions
> this explicitly) you *must not* use any other subnet when dealing with
> ULAs.
>
> So I decided for the following two subnets for machine A and
> B respectively: fd16:dcc0:f4cc:1::/64 and fd16:dcc0:f4cc:2::/64.
Interesting, I did not know that.
I know that if you want SLAAC to work, you need to assign a /64 prefix.
We use /112's for hosts but based on GUA's, and that works fine.
Mark.
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