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DHCP Server

Our network contains 1 windows server 2003 r2 dhcp server.  This server was recently "made" the new dhcp server after the last server that was handling dhcp crashed.  Now, the new DHCP is configured to hand out 50 IP addresses.  I've noticed that the dhcp server is handing out multiple IP addresses to the same servers on the network.  All of our servers on our network are configured with static IP's and all of a sudden, the dhcp server is handing out 10 different IP addresses for 3 different servers.  So our scope is being maxed out pretty quickly.  I've noticed the unique ID column on the servers says "RAS" for each IP handed out and all other IP's handed out to client computers have their own unique id.  I'm assuming this has something to do with RAS configuration but i'm not sure why the dhcp server keeps handing out multiple addresses...they all expire at the same time too.  I have to keep deleting the "extra" IP's on the scope to free up room for guest laptops coming in and needing dhcp.
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Kevin Kilgore
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Kevin Kilgore
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1 Solution
 
Mike ThomasConsultantCommented:
These are being assigned to "RAS" Remote clients via the RAS server so the dhcp server is assiging blocks to the RAS server, to pass onto clients in reality.

If you need remote clients then allow for this by upping your scope or modifying the RAS servers, but as the only thing that has changed was your DHCP server after a crash so I suspect you may have conbfigured a smaller scope on the new server? if so just increase it.


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Kevin KilgoreAuthor Commented:
thanks for the info, I thought of increasing it but I want to resolve the problem rather than get around it...we don't utilize RAS for anything so I'm not sure if the RAS is coming from mulitple servers requesting RAS connections or some other source.  Is there a way to disable the handing out of RAS IP's from within the DHCP server?  
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Mike ThomasConsultantCommented:
iirc only by removing you RAS servers, check your servers to see if its installed.

IAS servers might behave like this also (not to be confused with ISA) check those too if you have any.
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Paul MacDonaldDirector, Information SystemsCommented:
No, but you can tell the RAS servers to not use DHCP as a source for IPs.  In RRAS, right-click on the server and select Properties.  On the IP tab, configure the server to use a "Static address pool" rather than DHCP.
Alternatley, if you're really not using RRAS, you're better off turning it off altogether.
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