Re: DNS-Urgent-Help
- From: Jorge_de_Almeida_Pinto <UseLinkToEmail@xxxxxxxxxxxxxxxxx>
- Date: 26 Jun 2005 21:36:22 -0400
"Medo_in_Egypt" wrote:
> Dear All,
>
> We are Planing to Have One Forest, with Multiple Domains Trees
> as the
> following :-
>
> 1. KTC.COM
> 2. MUX.COM
> 3. TRU.COM
> 4. LON-UK.COM
>
> and Each one of the abouve Domain have 25 users as the
> following :-
> 1. KTC.COM ( Have 25 Users ).
> 2. MUX.COM ( Have 25 Users).
> 3. TRU.COM ( Have 25 Users).
> 4. LON-UK.COM ( have 25 Users ).
>
> So the Total Users will be 100 Users.
>
> i am going to install KTC.COM as the Forest Root Domain, &
> Install DNS
> server on one Machine and configure one Forward Zone with name
> of the Forest
> Root Doamin which is ( KTC.COM) and this DNS server is the
> Root ( .) .
>
> and i found that its Working and the Forest Root is Working
> and the Domain
> Controller is Able to communicate with the Default DNS.
>
> All of 100 users in the Same Network with this IP-Address
> Schema (
> 192.168.1.X ) / 24.
>
> Now, i want to install the Domain ( MUX.COM) as New Domain
> Tree in the
> exsisting Forest to share the same Exchange Box.
>
> so what i did is :-
>
> 1. Bring New Server.
> 2.Install Windows Advanced Server 2000 Enterprise edition.
> 3.Put this IP-Address 192.168.1.20 & the DNS For this server
> will be the
> Same which is 192.168.1.20.
> 4. Install the DNS on that Machine.
> 5.Run this Command ( DCPROMO).
>
> Here is the Problem, i found that , while i am trying to
> install the domain,
> its display error message which is ( The Domain Controller for
> Domain
> KTC.COM, is Not available ).
>
> so when i face this situation, i said to my self, this is
> because the Domain
> ( MUX) is unable to find the DNS and then unable to find the
> Domain
> Controller for KTC.
>
> ( Because the Role is , the Active Directory Clients -
> WinXP-PRO, Win
> Server, Win2000 Pro, Win98 ...ETC, should first ASK there DNS
> server to Get
> from him the Specifc Resource Recourd , and in this Case i was
> installed DNS
> on This Machine and i made it as Root , which is Wronge ).
>
> So what i did is :-
> 1.uninstall the DNS server from the Domain ( MUX.COM )
> 2.Create Forward Lookup Zone with this Name ( MUX.COM).
> 3. Configure the Server to register him self in the DNS of the
> Domain
> KTC.COM ( By Changing the IP-Address of the Preferd DNS
> server, to be the DNS
> server of the Domain KTC.COM , instead of MUX.COM ).
> 4. Run again the DCPROMO Command .
>
> then i found that its working Perfect. without any problem and
> the Trust
> Relation ship is created automatically and the Users in Both
> Domains are able
> to access each other .
>
> =====================================================
>
> My Questions is :-
>
> 1. Can the DNS Host Multiple Domains like My Situation , or
> Not ?
>
> 2. is there any Problems i will face it in the Future from
> this Design ,
> with One DNS Server and hosted Multiple Domains on it , and
> the clients for
> MUX , will recorde them self only in MUX.COM Forward Lookup
> Zone, and the
> users of KTC.COM, will register them self in the KTC.COM
> Forward Lookup Zone.
> , do you excepect any Problems in the Future ?
> =====================================================
> I tested it from The Clients which is they are register them
> self in The
> Forward Lookup Zone of the domain KTC.COM, by using the
> command NSLOOKUP, and
> i found that they are able to commnuicate with the DNS server
> & can see each
> other in this Forward Lookup Zone only with the name of the
> Domain ( KTC.COM
> ), while they are unable to see any Resource for the domain (
> MUX.COM ) at
> all, and the same situation for MUX.COM, they are able only to
> see the
> Resouce in the Domain MUX.COM only and unable to see the
> Resource in KTC.COM.
>
> so do you think i am correct , or not ? Please Help ?
Hi Mohammed,
Remember that to have 4 domains you at least need 4 DCs (1 DC per
domain). However it is recommended to have at least 2 DCs per domain
for redundancy purposes. With 2 DCs per domain you still have 1 DC if
the other one dies.
At least have 2 DCs for the root domain! If that one dies and your
backup is bad the rest of your forest is screwed too!
When accounting for redundancy for each domain you will need at least
8 DCs, just for 100 users. In my opinion, that is a lot of money on
hardware and licenses for just 100 users.
I?m very interested in the answer to the following question:
Why are you installing a total of 4 domains in one forest for a total
of 25 users per domain (100 user for the whole forest)?
Cheers ,
--
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