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Re: Draft internic ip allocation doc
From: "Louis A. Mamakos" <louie () uu net>
Date: Tue, 16 May 1995 23:07:03 -0400


No, I think he means longer. IN-ADDR.ARPA can only be delegated on octet
boundaries, so IN-ADDR for /16 and shorter prefixes will be delegated in /16
chunks. IN-ADDR for prefixes longer than /16 must still be maintained by the
root, since they cannot be delegated.

For example, assume an ISP has been allocated the prefix 204.160/14. Along with
this, the InterNIC will delegate the corresponding IN-ADDR domains:

      160.204.IN-ADDR.ARPA
      161.204.IN-ADDR.ARPA
      162.204.IN-ADDR.ARPA
      163.204.IN-ADDR.ARPA

If the ISP were instead only assigned 204.160.0/17, the associated IN-ADDR
range would be:

      0.160.204.IN-ADDR.ARPA
      ...
      127.160.204.IN-ADDR.ARPA

which is not octet-aligned and therefore cannot be delegated.


Well, you can delegate these as 128 individual zones.  With a little
bit of automation to help, it may approach practical.  You can
delegate a single domain name in the limiting case.

Louis A. Mamakos,  Manager of Network Engineering   louie () uu net,  uunet!louie
UUNET Technologies, Inc.                            Voice: +1 703 206 5823
3060 Williams Drive                                 Fax:   +1 703 206 5908
Fairfax, VA 22031



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