Re: Taking Domain Controller Offline

Depends of the DHCP clients lease, if you think that the amount of time that
the DC/DHCP is down is enough for the clients, then you shouldn't need an
additional DHCP server, of course if you've one in place you should use it
as long as doesn't provide duplicated address as I stated before, also make
sure that the clients are able to use the additional DNS server.

--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services
"Julio" <Julio@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:8B6F41AD-01E7-4CF8-9863-C2CA496B8044@xxxxxxxxxxxxxxxx
I really appreciatte your help Jorge with this matter. I just want to make
sure I'm clear on this, but my only option is to bring another DHCP server
online, correct?

"Jorge Silva" wrote:

i think you missed the post of Julio, where he says it's going down for
only 3-4 hours.

Sounds like you missed my post !!!
In previous post I said "assuming that the DHCP lease won't cover the
amount
of time that the DC will be down"
;)
--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services
"Mathieu CHATEAU" <gollum123@xxxxxxx> wrote in message
news:OQKm%23pz$HHA.4476@xxxxxxxxxxxxxxxxxxxxxxx
i think you missed the post of Julio, where he says it's going down for
only 3-4 hours.

The DNS part is needed, but workstation would survive if the DHCP lease
is
long enough and they can ping the gateway

--
Cordialement,
Mathieu CHATEAU
http://lordoftheping.blogspot.com


"Jorge Silva" <jorgesilva_pt@xxxxxxxxxxx> wrote in message
news:eTjxz$v$HHA.5164@xxxxxxxxxxxxxxxxxxxxxxx
Yes, on the new DHCP make sure that the clients get both DNS, the one
that is going down and the other that is online to serv client
queries,
the problem is the duplicated address because if the new DHCP isn't
aware
of the ip addresses that were attrib to those clients, to prevent that
make sure that the DHCP doesn't lease the same range of address that
the
other did, also make sure that you've other roles needed by the
clients
available, like GC, WINS, etc... Note: if you've clients that use ADUC
they may expirience errors trying to open the mmc snapin, that is
normal
because the mmc is trying to get the last DC that the mmc saved in
their
console, all they have to do is to point to an existing online DC the
same applies to other mmc consoles like gpmc.msc, etc...

--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services
"Julio" <Julio@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:C21E1479-9E0B-410B-AF02-A976772D81DF@xxxxxxxxxxxxxxxx
Besides bringing another DHCP server online, is there anything else
that
can
be done?

"Jorge Silva" wrote:

you probably need a second DHCP srtver assuming that the DHCP lease
won't
cover the amount of time that the DC will be down.

--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services
"Julio" <Julio@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:4A5FDC0B-03BA-4DDD-A118-C80730A719DA@xxxxxxxxxxxxxxxx
The users are using DHCP and the server that I will be taking
offline
is
also
their DHCP server.

"Jorge Silva" wrote:

they need to have an additonal DNS server configured under their
NIC
properties

--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services
"Julio" <Julio@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:F2F26BF8-541B-4FF9-9BE2-DD59F6906E8C@xxxxxxxxxxxxxxxx
There is no alternate DNS server at that site. How would I
verify
that
all
users are using the alternate DNS server prior to taking down
the
DC?

"Jorge Silva" wrote:

Hi
Make sure that the DC isn't offline more than your forest
tombstonelifetime.
Do you have an additonal DNS server on that Site1? If yes the
users
and
assuiming that the computer accounts are using that alternate
DNS,
they
should be automatically redirected to the alternative site in
order to
authenticate with that additiobal DC. If NO make sure that the
users
are
using any other available DNS server so tehey can get
authenticated
with
that DC.
Other concers would be having a GC available especially if you
have
Apps
that need a Gc like Exchange.
--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MCSE, MVP Directory Services
"Julio" <Julio@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:2FD58AE3-64E0-4893-ADD0-AB652004F7C9@xxxxxxxxxxxxxxxx
I will be needing to take one of our servers (2003 DC)
offline
temporarely
(dc is located at site 1). How do I point all of the users
(that are
located
at site 1) logon authentications to go to our other site
(site
2)
temporarely
until the server at site 1 comes back up? Both servers are
GC
servers
and
are
located at separate sites and are on different subnets.
Please advice.

Thanks

Julio

















.

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