reverse addressing

Hi Nader,

  > We are Global One Jordan and we own the 194.165.128.0 /19 group of class C
  > IP addresses. We need to have the delegation of reverse addressing for
  > these network addresses. What do we need to do in order to get that
  > delegation.
my understanding is that in this situation you will need to request
delegation of the reverse mapping for each /24 from RIPE NCC.
I assume that you want to further delegate the reverse mapping of smaller
parts of this space to be administered by your customers.

There is a technique to support delegation of reverse mapping zones
that allows delegation for prefixes longer than /24, i.e. sub-C
using classfull terminology (and a description has been published as an
RFC this year).
Unfortunately there is no technique to really support non-byte-boundary
delegation for reverse mapping for /23 or shorter prefixes -  well, at least
no way that I know of.

Ruediger Volk

Deutsche Telekom AG -- Internet Backbone Engineering

E-Mail:  rv at NIC.DTAG.DE