[c-nsp] IPv6 p2p transit link addressing

[Gert Doering]

Hi,

On Sun, Oct 03, 2010 at 06:20:17PM -0500, cisconsp at secureobscure.com wrote:
> Can I simply avoid the problem of p2p links altogether with unnumbered from
> an ipv6 loopback address?

You can.

> I fear that link local addressing will ruin traceroute information.

It won't, actually, as the routers will not pick a link-local address
to reply to traceroute, but another "suitable" address on the host.

OTOH, forcing "ipv6 unnumbered lo0" will just work - or you could use
/124s or just /64.

> Any definitive answers would be greatly appreciated. I would prefer not to
> burn up all of my routable address space with p2p /64's however.

I have serious doubts that your network has 4 billion p2p links.

Please do the math: at least in RIPE land, every LIR is entitled to use
one /48 per POP.  One /48 has 65000 /64s in it - there's just no way to
"burn all of your routable space" with p2p /64s.

gert
-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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