On 14/07/2015 10:26, Lorenzo Colitti wrote:
> On Jul 13, 2015 12:28, "Juliusz Chroboczek" <[email protected]>
> wrote:
>
>> - I'm setting the A flag even for prefix lengths different from /64,
>> which is a reasonable thing to do according to my reading of RFC 7421.
>
> What's the point of sending A=1 with a prefix length that's not 64?
Heh heh. That's part of why we wrote RFC7421.
Architecturally, A=1 and prefix length =N is perfectly fine, if and only
if all SLAAC-capable nodes on the link know how to generate an IID
of length 128-N.
In the real world this only works for N=64 today. afaik, there is no way
to negotiate a different value. IMHO it would have to be pre-configured
in every node on the link, but architecturally Juliusz is correct.
Brian
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