nameserver registration

[Chris Thompson]

On Jun 18 2011, Michael Sinatra wrote:
>
>In theory, you can insert glue records anywhere above the zone in 
>question.  See RFC 2181, section 5.4.1.
>
>As an example, glue for the servers adns1.berkeley.edu and 
>adns2.berkeley.edu exist in the root zone.

For "fj", "hk", and "xn--j6w193g". These are examples of what some
of the BIND documentation calls "sibling glue".

Of course, at the root zone level, *all* NS records need either
"required glue" or "sibling glue", because every single one of them
is somewhere under the root zone.  At least, until the aliens contact
us and we get the Internet spliced into the Galactinet ..

Also, the "required glue" + "sibling glue" desideratum is not always
enough. Consider

  foo.com.  NS  ns1.bar.net.
  foo.com.  NS  ns2.bar.net.

and

  bar.net.  NS  ns1.foo.com.
  bar.net.  NS  ns2.foo.com.

Neither seems to to need glue in either "com" or "net", but without 
either the domains cannot be resolved. This was a significant issue
when VeriSign changed the way the *.gltd-servers.net responded last
year.

-- 
Chris Thompson
Email: cet1 at cam.ac.uk