Re: IPv6 default routes / NM vs. kernel autoconfig vs DHCP6

[Stuart D Gathman <stuart gathman org>]

On 08/08/2012 03:00 AM, Tore Anderson expounded in part:
> > This could
> > get non-trivial when there are multiple routes provided by RA.  NM
> > must then find the route that matches the DHCP6 address to determine
> > the correct prefix.
> An address assigned by DHCPv6 IA_NA is just that, a single address.
> DHCPv6 cannot provide a prefix length, or indeed any routes at all. The
> implicit prefix length if an IA_NA assignment, therefore, is always
> /128.
Ah yes.  When the RA router IPs are link local, you don't care about a 
prefix (link local IPs are a cool feature of IP6).  But *sometimes*, the 
router IP is global, and you have to assign a prefix to the DHCP6 IP to 
be able to talk to that router.

However, perhaps that is too unusual for NetworkManager to support. All 
the IP6 lans I am currently using have link local router IPs advertised 
by RA.  I think the one that had a global IP was on openwrt - and 
perhaps because I had set the prefix to /80 (to put the wireless clients 
on their own subnet).