Point-to-point /64

[Arie Vayner]

/127 is actually what IETF recommends in RFC6164 (
http://tools.ietf.org/html/rfc6164)
/126 is not officially supported in this RFC.

I have used /127 on "real" P2P links as well as Ethernet links connecting 2
routers.

Arie


On Sat, Jun 1, 2013 at 2:30 PM, <sthaug at nethelp.no> wrote:

> > > I do /127 p2p
> > >
> > > Subnet anycast is not a supported feature or requirment in my network.
> >
> > As subnet anycast is a integral part of IPv6, you might not want to
> > support or require it, but the gear will implement it and thus one point
> > it will bite you as suddenly it won't work.
> >
> > Likely though you are just putting the PtP links as 2x /128 and not as a
> > /127 on the link. The former works, the latter breaks.
>
> Funny, /127 works great for "real" point to point links (SDH). I tried
> it just now on an Ethernet link between a JunOS 11.4 box and an IOS XR
> 4.2.3 box in my lab - and it seems to work just great there too.
>
> What is the real usage of IPv6 subnet anycast?
>
> Steinar Haug, AS 2116
>
>
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