Hello Doug!
Sorry, it is my mistake. What is about the simpliest diagram? :-)
(Central Site)
172.16.0.0/12
/ \
(Regional Site) 172.16.0.0/16 . . . . . . . .
(Regional Site) 172.30.0.0/16
\
\
. . . . . . . . (Local Site) 172.16.16.0/20 . . . . . . .
. . . . . . . . . (Local Site) 172.30.32.0/20 . . . . .
. . .
Central delegates to Regional /16 block, Reginal to Local /20.
In terms of forward zone delegation it would be:
united-networks.ru (Central) -> msk.united-networks.ru (Regional,
Moscow) -> sokol.msk.united-networks.ru (district in Moscow City).
or
united-networks.ru (Central) -> abakan.united-networks.ru (Regional,
Khakasia republic with Abakan as capital, Russia)->
kurochkina.abakan.united-networks.ru (district in Abakan).
So I thought to set up reverse delegation by analogy with this.
The below article doesn't answer on question how to formalize /20
delegation. Instead it shows how to make < /24 delegation.
http://dougbarton.us/DNS/2317.html
Kind regards,
Ellad
You don't set up the /12 zone at all.
You haven't made it clear what the relationships are between the sites,
and who needs to resolve what. You also haven't made clear where the
resolving name servers are for these sites. In order to help we really
need more information about what you're trying to accomplish.
I used a trick and made zone 172.in-addr.arpa. It is not exact but it
works.
You really don't want to do that.
But I can't at all to delegate block 172.16.0.0/16 to second level
server to say nothing about delegation 172.16.16.0/20 from second level
to ending DNS!
You probably don't want to delegate them at all, you probably want to
just set up the /16 zones on the appropriate local server. If other
sites need to resolve the addresses for a /16 assigned to one city,
there are various ways that this can be accomplished, but as I said
above we need to know more about what you're trying to do.
For delegation of the /20 zones, see:
http://dougbarton.us/DNS/2317.html
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