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Force workstation to use a specific DHCP server ?

 
 
Tang
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      12-02-2009

Hello!

Does anyone know of a way to force a workstation to use a specific DHCP
server ? I'm just into a situation where a Windows Server 2003 have DHCP
server active and the phone system also have DHCP server active.

Several workstations keeps getting their IP information from the phone DHCP
server rather than the Windows 2003 DHCP server.

I know the real fix is to kill the DHCP server on the phone system but our
phone provider need to use the DHCP server for the phone configuration.

Any ideas are welcome.

Thank you !

Tanguy Brasseur
 
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Ace Fekay [MCT]
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      12-02-2009
"Tang" <> wrote in message
news:51AC41F5-1EF9-4E31-A1F9-...
> Hello!
>
> Does anyone know of a way to force a workstation to use a specific DHCP
> server ? I'm just into a situation where a Windows Server 2003 have DHCP
> server active and the phone system also have DHCP server active.
>
> Several workstations keeps getting their IP information from the phone
> DHCP
> server rather than the Windows 2003 DHCP server.
>
> I know the real fix is to kill the DHCP server on the phone system but
> our
> phone provider need to use the DHCP server for the phone configuration.
>
> Any ideas are welcome.
>
> Thank you !
>
> Tanguy Brasseur


You already know the answer. And no, you can't make a machine use a specific
DHCP. You can play around with DHCP vendor and other options, but to please
the phone vendor? Ask the phone vendor what specifically is the phone system
looking for DHCP options-wise.

If they can't answer that question, then your only course of action is to
put the phone system on a separate switch with their own subnet. I think I
would have probably done that just to keep them separate, however I've
worked in environments with an Avaya phone system on the same subnet as
other machines, and we simply used Windows DHCP and set specific vendor
options at Avya's direction in regards how to set it up.

--
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Please reply back to the newsgroup or forum for collaboration benefit among
responding engineers, and to help others benefit from your resolution.

Ace Fekay, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA
2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer

For urgent issues, please contact Microsoft PSS directly. Please check
http://support.microsoft.com for regional support phone numbers.


 
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Meinolf Weber [MVP-DS]
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      12-02-2009
Hello Tang,

You can't do it. The client doesn't know if there is a DHCP server, it broadcasts
"i need an ip address" and then first come, first serve, is the way it is
handled.

What you can do in Windows server 2008 R2 is to define a delay for the answer
in a split scope environment, but only for Windows server 2008 R2 DHCP servers.
http://technet.microsoft.com/en-us/l...64(WS.10).aspx

Best regards

Meinolf Weber
Disclaimer: This posting is provided "AS IS" with no warranties, and confers
no rights.
** Please do NOT email, only reply to Newsgroups
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> Hello!
>
> Does anyone know of a way to force a workstation to use a specific
> DHCP server ? I'm just into a situation where a Windows Server 2003
> have DHCP server active and the phone system also have DHCP server
> active.
>
> Several workstations keeps getting their IP information from the phone
> DHCP server rather than the Windows 2003 DHCP server.
>
> I know the real fix is to kill the DHCP server on the phone system but
> our phone provider need to use the DHCP server for the phone
> configuration.
>
> Any ideas are welcome.
>
> Thank you !
>
> Tanguy Brasseur
>



 
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John John - MVP
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Posts: n/a

 
      12-02-2009
Bill Kearney wrote:
>> I know the real fix is to kill the DHCP server on the phone system but
>> our
>> phone provider need to use the DHCP server for the phone configuration.

>
> You cannot have more than one DHCP server on the wire. You MUST kill
> one or the other.
>
> The windows server can be configured to offer anything the phone system
> needs. Find out what it needs and put that in your windows DHCP server.
>
> You will not ever get it working with the two of them running at the
> same time.


People very often use multiple DHCP servers for fault tolerance, as long
as the scopes are properly configured there is usually no problem with
multiple DHCP servers.

John
 
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Phil Angus
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      12-03-2009
Find out what it needs, take the mac address and simply reserve it with that
IP.

"Tang" <> wrote in message
news:51AC41F5-1EF9-4E31-A1F9-...
> Hello!
>
> Does anyone know of a way to force a workstation to use a specific DHCP
> server ? I'm just into a situation where a Windows Server 2003 have DHCP
> server active and the phone system also have DHCP server active.
>
> Several workstations keeps getting their IP information from the phone
> DHCP
> server rather than the Windows 2003 DHCP server.
>
> I know the real fix is to kill the DHCP server on the phone system but
> our
> phone provider need to use the DHCP server for the phone configuration.
>
> Any ideas are welcome.
>
> Thank you !
>
> Tanguy Brasseur



 
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