Draft internic ip allocation doc
Louis A. Mamakos
louie at uu.net
Wed May 17 03:07:03 UTC 1995
> 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 at 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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