Re: Setting up IPv6

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Tue, 15 Nov 2016 07:14:34 -0700
    From:        Andy Ruhl <acruhl%gmail.com@localhost>
    Message-ID:  <CAJcb3fq9RxvYFTZAyM6wjJteE9q=1rqi_7xfnk8VtxBNo+zJfw%mail.gmail.com@localhost>

  | What subnet?

Exactly.   That's why it depends upon the ISP and how they config things.

Either they provide a static address, and it simply gets configured,
or the ISP supports the DHCPv6 prefix delegation option, and along
with the assignment of the address for the link to the ISP, there
can also be (one or more) additional prefixes to use for internal config.


  | He's only getting a single IPv6 address from the ISP right?

Probably, but that may because his DHCP request isn't asking for a prefix.

  | If I understand this right - if he's doing "autohost" on the hosts,
  | those should be getting a /64 advertisement, but it's not clear to me
  | where this prefix comes from if it's a global, routable one.

Where it comes from is the issue here - it all depends upon the ISP.
It is possible the ISP will only provide a single IPv6 addr, though that
would be a horribly defective IPv6 service.   More likely more is available,
the question is with that particular ISP, how the more gets obtained.

The prefix obtained should certainly be a global (and routable) prefix.
Configuring a local prefix (non routable) is certainly possible, but not
very useful alone.

Greg Troxel  <gdt%lexort.com@localhost>   said:
  | I am unclear on if you need a rtadvd.conf.  

That should only be required if some of the default parameters need to be 
altered.   If the default values are OK, then rtadvd will supply them without
the config file.

kre