[c-nsp] IPv6 SLAAC on P2P or QinQ subints

[Gert Doering]

Hi,

On Wed, Nov 07, 2012 at 09:11:46AM -0700, Tim Densmore wrote:
> Currently for most v4 DSL subscribers, we use "ip unnumbered" pointing 
> towards a loopback that functions as the gateway and use DHCP or host 
> routes or radius to assign IPs.  This config appears impossible using 
> v6, since loopbacks don't send RAs, and DAD wouldn't work with multiple 
> isolated P2P links all IPd from the same /64 in any case.  Basically, 
> I'm looking for a way to send non-link-local RAs down ATM P2P subints, 
> and dot1q qinq subints.
> 
> What's BCP for this scenario?

As far as I know, if it's static interfaces (as in "not dynamically
created virtual-access stuff that can be filled from Radius") all you
can do on IOS is 

  interface <foo>
    ipv6 address 2001:db8:this:customer::1/64

but since you mention "radius to assign IPs" - in that case it might
be possible just have radius send IPv6 prefix config as well
(cisco-avpair = "ipv6:prefix#1=2001:db8:this:customer::/64", plus
"ipv6 unnumbered lo0" on the actual interface)

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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