Subject: Re: RFC6177 and prefix assignment size (was Re: SLAAC on non-/64 networks)

From: "Mudric, Dusan (Dusan)" <[email-masked]>
Date: Wed, 28 Mar 2018 21:27:30 +0000

>     > The more I think about it, the more I realise that it's the mass-market CE
 > routers
 >     > that maintain the /64 boundary, not the text of any RFC.
 >
 >     it certainly seems that there need to be continued efforts made to
 >     change the prefix assignment mindset to be generous with IPv6 and
 >     allow sufficient subnets to users!
 >
 > Let's move on !

 [[Dusan]]
What is a flexible host algorithm?

RFC2464:
"    An IPv6 address prefix used for stateless autoconfiguration [ACONF]
    of an Ethernet interface must have a length of 64 bits. "

Can we change this definition? For example:

" .. For stateless autoconfiguration [ACONF], an Ethernet interface MUST have
 ...at least one /64, or shorter, bits IPv6 address prefix. In addition, the interface
 can have
    other prefixes of any length. A host can use all the prefixes for SLAAC and
 might
 ...prefer creating SLAAC addresses using only longer than /64 prefixes.
.
rfc6724#section-5, SASA rule 8 will prefer longer prefixes "
 
Thanks,
Dusan