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New Default Gateway via DHCP in stages

Hi All,

We are replacing our Default Gateway over the weekend.  The new Gateway has a new IP address to the old one, as we want the option to role back if there are issues.

My question is;

Is there a way to give 20 specific users the new gateway using DHCP and leave the rest on the old gateway?

I thought I could take 20 IP's out of the current range and setup a new scope on a new DHCP server and use reservations to give them out.  But the users appear to go to the quickest server to respond, which isnt always the quickest.


Many thank
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detox1978
Asked:
detox1978
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1 Solution
 
Liam SomervilleCommented:
Something like MAC filtering may work for your purposes: http://technet.microsoft.com/en-us/magazine/ff521761.aspx
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detox1978Author Commented:
How do I make it only use the new scope?
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Liam SomervilleCommented:
Sorry, I misread that you were changing DHCP servers as well. What about creating static reservations for your test users that use the new gateway?
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detox1978Author Commented:
I don't have to create the new server, I only did it because I didn't think you could create a second scope with the same subnet on the same server.

I tried doing it using reservations, but this only works when the new server responds. So if it can be done on the one server that would make it a lot easier.
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Liam SomervilleCommented:
That's what I mean, using a single server, create DHCP reservations for specific clients with the new IP. If things break, just delete the reservation.
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detox1978Author Commented:
How do I get the reservations to get the new default gateway?
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Liam SomervilleCommented:
I'm assuming that you're using Windows Server for your DHCP. You'd create a new Reservation as normal (right-click Reservations, New Reservation) and then edit it (right-click, Configure Options), then add the "003 Router" option with your new DG.
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detox1978Author Commented:
Ah, I was trying to edit the existing Option, but adding a new one overwrites the original.
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