Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Point Windows 7 to Specific DHCP Server?

Posted on 2015-01-13
6
Medium Priority
?
420 Views
Last Modified: 2015-01-13
I have DHCP setup on two different pieces of equipment in my current environment, not my choosing. Both scopes are on VLAN 1 with different ranges.

1) DHCP on a Windows 2008 R2 Server -  For Virtual PCs (VMware View)
2) DHCP on a Cisco IOS Switch - Preboot for IP phones with options, which point them to reboot on the Voice VLAN

The IP Phones are having problems registering to the Windows 2008 R2 Server, hence the reason for using the Cisco Switch (according to the phone vendor).

The PCs keep pulling DHCP from the Cisco Switch, because it is responding first.

I know i can't do MAC filtering for DHCP on the Cisco Switch.

So, what are my other options?

Can I point my Windows 7 PCs to a specific DHCP server? If so, how?  

Thank you Experts!
0
Comment
Question by:First Last
6 Comments
 
LVL 1

Expert Comment

by:john15nlt
ID: 40546613
Its there a specific reason you have to use the the dhcp server off the Windows 2008 server. I have seen the issue you are speaking of in regards to the ip phones, but it seems the simple solution is to turn off the dhcp on the windows server.
0
 
LVL 60

Expert Comment

by:Cliff Galiher
ID: 40546623
DHCP is a broadcast protocol and that is inherent in its design. You cannot "point" a client at a specific server... that'd defeat the purpose of DHCP. The only way to limit DHCP responses is to limit the broadcast domain (VLANs, routers, etc) or limit the server's responses via class/vendor/mac filtering or similar. It can't be done on the client end.
0
 
LVL 53

Expert Comment

by:Will Szymkowski
ID: 40546648
As stated already there is no setting to accomplish this but what you can do is the following.
Example
Have your DHCP servers on VLAN1 have your workstations on VLAN2 and only assign a DHCP helper address on VLAN2 for the DHCP server you want your clients connecting to. If you do not add a helper address for the second DHCP server your clients will never use it.

This is just an example of how you can get around what your trying to accomplish. This is by no means a best practice because if that DHCP server goes down then all of your clients will no longer get leases and when their lease expires they will not be able to communicate on the network.

Will.
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
LVL 1

Author Comment

by:First Last
ID: 40546753
Will -

Any idea on how i should configure the new VLAN 5 to point to VLAN 1 which is where the DHCP server is located?

I created the VLAN:
vlan 5
 name ViewDesktops


interface Vlan5
 no ip address
 ip helper-address 10.35.208.70
end



I enabled the vlan 5

I assigned my switch port to the VLAN
interface GigabitEthernet10/9
 switchport access vlan 5
0
 
LVL 53

Accepted Solution

by:
Will Szymkowski earned 2000 total points
ID: 40546966
Take a look at the link below to assist with setting up the IP Helper.

IP Helper

Will.
0
 
LVL 1

Author Comment

by:First Last
ID: 40547238
Will - Great answer!  Your solution would work, but not in my situation. It won't work for me because both VLANS need to have the same IP Range. So, i'm going to physically move everything from two different DHCP servers to one DHCP server and keep everything on one VLAN.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The Windows functions GetTickCount and timeGetTime retrieve the number of milliseconds since the system was started. However, the value is stored in a DWORD, which means that it wraps around to zero every 49.7 days. This article shows how to solve t…
IF you are either unfamiliar with rootkits, or want to know more about them, read on ....
This tutorial will show how to configure a single USB drive with a separate folder for each day of the week. This will allow each of the backups to be kept separate preventing the previous day’s backup from being overwritten. The USB drive must be s…
This Micro Tutorial will give you a basic overview of Windows DVD Burner through its features and interface. This will be demonstrated using Windows 7 operating system.
Suggested Courses

926 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question