Assigning /64 but using /127 (was Re: Waste will kill ipv6 too)
owen at delong.com
Thu Dec 28 21:32:41 CST 2017
> On Dec 28, 2017, at 10:34 , JORDI PALET MARTINEZ <jordi.palet at consulintel.es> wrote:
> This may be useful:
> -----Mensaje original-----
> De: NANOG <nanog-bounces at nanog.org> en nombre de Octavio Alvarez <octalnanog at alvarezp.org>
> Responder a: <octalnanog at alvarezp.org>
> Fecha: jueves, 28 de diciembre de 2017, 19:31
> Para: Owen DeLong <owen at delong.com>
> CC: <nanog at nanog.org>
> Asunto: Re: Assigning /64 but using /127 (was Re: Waste will kill ipv6 too)
> On 12/28/2017 11:39 AM, Owen DeLong wrote:
>>> On Dec 28, 2017, at 09:23 , Octavio Alvarez <octalnanog at alvarezp.org> wrote:
>>> On 12/20/2017 12:23 PM, Mike wrote:
>>>> On 12/17/2017 08:31 PM, Eric Kuhnke wrote:
>>>> Call this the 'shavings', in IPv4 for example, when you assign a P2P
>>>> link with a /30, you are using 2 and wasting 2 addresses. But in IPv6,
>>>> due to ping-pong and just so many technical manuals and other advices,
>>>> you are told to "just use a /64' for your point to points.
>>> Isn't it a /127 nowadays, per RFC 6547 and RFC 6164? I guess the
>>> exception would be if a router does not support it.
>> Best practice used most places is to assign a /64 and put a /127 on the interfaces.
> Thanks for the info. Is this documented somewhere? Is there a
> disadvantage in letting many P2P links use different /127 networks
> within the same /64?
Primarily human factors.
> Best regards,
> IPv4 is over
> Are you ready for the new Internet ?
> The IPv6 Company
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