Mr. Anderson, On Sat, Jun 28, 2008 at 05:36:04PM -0400, Dean Anderson wrote: > A number of the points you raise have already been addressed. > > The IPV6 Reverse resolution question has been discussed at length in > DNSEXT previously. In fact, it was proposed to remove reverse resolution > entirely from IPV6 for just the reason Dr. Huang notes. A 128 bit IPV6 > address is 16 octets. To perform reverse resolution requires traversing > 16 levels of DNS tree.
Not exactly. The reverse delegation is at the 4 bits boundary, so the correct is 32 possible levels, but this possibility doesn't impose all these levels. Half of the levels are unlikely to be used and the other half you'll see normally the average of 3 to 4 as we see it today for IPv4. The amount of delegations levels are driven by the IP distributions layers (IANA-RIR-NIR-ISP), not by the address space. Fred _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
