Re: IPv6 addressing for core network

[Iljitsch van Beijnum <iljitsch () muada com>]

On 9 feb 2011, at 10:48, sthaug () nethelp no wrote:

> > The all zeros address is the all routers anycast address so on most non-Cisco routers you can't use it, ruling out 
> > /127. The top 128 addresses in any subnet are also reserved anycast addresses although they don't do much in 
> > practice. So the longest prefix length you should use is /120 and only use addresses 1 - 127.

> A /127 mask is still the best way to handle real point-to-point links
> like SDH/SONET today, to avoid the ping-pong problem. Works fine with
> Cisco and Juniper, not tried with other vendors.

I know it's immature, but I can't wait for some new hire at vendor C or vendor J to reread the RFCs and implement the 
all routers anycast address according to spect and then see sparks fly.

Like I said, global scope addresses on your router-to-router interfaces is such IPv4 thinking.