Re: IPv6 prefix lengths - how long?

[Brian E Carpenter <[e-mail]>]

I can't speak for the other authors of draft-bourbaki-6man-classless-ipv6,
but my answer is: this question isn't our business. If we disestablish
the /64 boundary, we surely don't replace it with a new one.

Privacy considerations are probably a determining factor, as we
hinted in https://tools.ietf.org/html/rfc7421#section-4.5

Regards
   Brian

On 08-Jun-19 05:43, Templin (US), Fred L wrote:
> Hi, we all know about the tussle regarding the /64 boundary for IPv6 prefixes but
> 
> assuming that we will one day want to allow longer prefixes the question is “how long”?
> 
>  
> 
> We all know about /127 for point to point links, but I am not talking about those. I am
> 
> talking about prefixes that are assigned to nodes that might be acting either as routers
> 
> or as multi-addressed hosts.
> 
>  
> 
> Because of RFC7934, we see the value of Host Address Availability Recommendations.
> 
> It makes the point that, due to the nature of multi-addressing supported by IPv6, it
> 
> would be useful for each node to be able to configure multiple (perhaps even many)
> 
> IPv6 addresses from an IPv6 prefix. But, “how many”?
> 
>  
> 
> My assertion is that a multi-addressed host (or, an End User Network router) should
> 
> support numbering for at least 1K IPv6 addresses. This would imply that (assuming
> 
> at some point the /64 boundary is relaxed) the longest IPv6 prefix should be a /118.
> 
>  
> 
> Thoughts?
> 
>  
> 
> Fred
> 
> 
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