Re: Taking Domain Controller Offline

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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