[Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01]

Mark Smith nanog at 85d5b20a518b8f6864949bd940457dc124746ddc.nosense.org
Thu Apr 29 06:26:57 CDT 2010


On Mon, 26 Apr 2010 07:46:04 -0700
Jim Burwell <jimb at jsbc.cc> wrote:

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> On 4/26/2010 03:36, Mikael Abrahamsson wrote:
> > On Sun, 25 Apr 2010, Owen DeLong wrote:
> >
> >> I fail to see how link local is any more difficult than any
> >> other IPv6 address.
> >
> > They're different because you have to know your local network
> > interface name as well.
> >
> >> Windows might get interesting as windows interface naming is,
> >> uh, creative at best.
> >
> > Exactly.
> >
> Installation software could make this easy.  It could either prompt
> the user to type in the address on a sticker then enumerate all
> interfaces on the system and attempt to contact the router on each NIC.
> 
> Another possibility is that it could enumerate all the interfaces,
> then use the IPv6 link-local scope all routers multicast (ff02::2) to
> enumerate a list of routers found on each link, sort them and/or
> filter them by ethernet OUI, and present a list of choices for the
> user to click on to configure the router.  The user could also easily
> match the enet address on a little slip of paper or sticker on the
> router to this list, or through some initial settings on the router
> which allow info to be pulled from it somehow, present a list of
> unconfigured routers, etc, etc.
> 
> Point is, I can imagine a lot of ways this could be made user-proof
> via software/firmware combination that requires no advanced networking
> knowledge.
> 

It's called multicast DNS. It's easier for that to deal just with
vanilla IPv6 addresses (i.e. via application calls to getaddrinfo()),
rather than IPv6 LL addrs + interface names.

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