Indeed, and I see a sheer wastage in blocking the entire /64 whose one /127 is used on p2p links.
There are many deployments that already assign bunch of /64 (or lower) prefixes per hierarchy and encode bunch of useful info in 72-96 and then assign thousands of /127s out of each /96 (or encode ipv4 loopbak address in it to get /128 loopback) to thousand of network infrastructure devices. This has pros and cons, but the point is that this should be a deployment choice, not a standard mandate. Cheers, Rajiv Sent from my Phone On Sep 21, 2012, at 7:06 PM, "Brian E Carpenter" <[email protected]> wrote: > On 21/09/2012 22:35, Usman Latif wrote: >> Thanks Wes for the feedback. > > ... >>>>> Without this stated clearly there is likely to be some instances where >>>>> readers interpret it the wrong way and end up assigning multiple p2p >>>>> links with /127 subnets from a single given /64 and end up having to >>>>> re-address their network in future when/if future standards use lower >>>>> order 64 bits for special purposes. >>> [WEG] Given the fact that there is a standard that documents the use of a >>> /127 for P2P links (6164), > > Wes, I think that statement is even a bit weak, since 6164 actually says: > > "assuming that a number of point-to-point links will be numbered out of a > single /64 prefix:" > > so it is very clear: it is allowed by the standard to share a /64 among > however many pt2pt links the operator cares to. This is *not* a wrong > interpretation. > > As you say, any future work will need to take account of this. > > Brian > -------------------------------------------------------------------- > IETF IPv6 working group mailing list > [email protected] > Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 > -------------------------------------------------------------------- -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
