one big reverse lookup zone

Hi! Our AD has about 26,000 computers. Right now we've got a messy mix
of Class B and Class C reverse-lookup zones that I want to clean up.
At first I was considering changing them all to class B's and getting
rid of the Class C's, but then I was thinking....

what about creating one giant Class A reverse-lookup zone? The entire
network is on the same first octet, and none of the addresses are
routable on the internet, so in essence we own the entire class A
range.

Thanks for your opinions...

- JayDee

Paul
Wed Mar 26 05:50:55 PDT 2008

We own a class B so we have the first two octets as all the same and we
allow the system to create the third octet for us and that works perfectly
fine. Not sure if this is a good or bad thing but would assume this is an
ok practice. I have never seen any info against it.

So if you create a single octet reverse zone the system will create the
folders for you of each subnet.

--
Paul Bergson
MVP - Directory Services
MCT, MCSE, MCSA, Security+, BS CSci
2008, 2003, 2000 (Early Achiever), NT4

http://www.pbbergs.com

Please no e-mails, any questions should be posted in the NewsGroup
This posting is provided "AS IS" with no warranties, and confers no rights.

"JayDee" <dopamine@mail.com> wrote in message
news:462ae412-6522-46bd-b514-826ca1101050@u10g2000prn.googlegroups.com...
> Hi! Our AD has about 26,000 computers. Right now we've got a messy mix
> of Class B and Class C reverse-lookup zones that I want to clean up.
> At first I was considering changing them all to class B's and getting
> rid of the Class C's, but then I was thinking....
>
> what about creating one giant Class A reverse-lookup zone? The entire
> network is on the same first octet, and none of the addresses are
> routable on the internet, so in essence we own the entire class A
> range.
>
> Thanks for your opinions...
>
> - JayDee

ctvader
Wed Mar 26 11:48:05 PDT 2008

We do the same as Paul - we own a class B as well and let the clients
create the 3rd octet.

JayDee
Wed Mar 26 12:04:35 PDT 2008

On Mar 26, 11:48=A0am, ctvader <jeff.sw...@gmail.com> wrote:
> We do the same as Paul - we own a class B as well and let the clients
> create the 3rd octet.

ok... if I decide to change all the B's and C's to one A or two all
B's, is there an easy way to do the migration or do I have to manually
add all the entries from the C zones into their parent B once I create
it? I hope not!

Thanks.

- JayDee

Paul
Thu Mar 27 05:39:49 PDT 2008

Unfortunately they won't magically appear. I wonder if you couldn't export
them and massage the text file then re-import them and see if that will
generate them for you.

Look at dnscmd and try this out in a test environment.

--
Paul Bergson
MVP - Directory Services
MCT, MCSE, MCSA, Security+, BS CSci
2008, 2003, 2000 (Early Achiever), NT4

http://www.pbbergs.com

Please no e-mails, any questions should be posted in the NewsGroup
This posting is provided "AS IS" with no warranties, and confers no rights.

"JayDee" <dopamine@mail.com> wrote in message
news:21342f70-1a94-4705-a8e3-c3a7979fbb16@s12g2000prg.googlegroups.com...
On Mar 26, 11:48 am, ctvader <jeff.sw...@gmail.com> wrote:
> We do the same as Paul - we own a class B as well and let the clients
> create the 3rd octet.

ok... if I decide to change all the B's and C's to one A or two all
B's, is there an easy way to do the migration or do I have to manually
add all the entries from the C zones into their parent B once I create
it? I hope not!

Thanks.

- JayDee