Graham, Ted is correct that wi-fi devices will attach to whatever network or DHCP provider to which they can secure a connection first. So the trick is to allow them to only connect to one and not the other.
We have a very similar setup at our office. Our 48-port switch is the main DHCP provider, and its IP address is 10.0.2.1. Our outside Internet connection is on 10.0.2.2. The servers are on 10.0.2.4 and 10.0.2.5. All of our end-users cabled devices have static IP addresses set between 10.0.2.10 and 10.0.2.223. Also cabled to the switch are three wireless routers. Two of these are password-protected and have their DHCP set to provide addresses 10.0.2.224 and above. The other wireless router is not password-protected and has its DHCP set to provide addresses in the 192.168.1.1 - 192.168.1.255 range. When an employee or visitor brings a new device into the office, they can only connected to the open (192.168.1.x) network where get only an Internet connection and cannot see any other devices or shared drives. Connecting the wireless device to our main (10.0.2.x) network instead is a two-step process. First, we connect to one of the password-protected routers; second, we move the password-protected connection higher in the device's list of saved network connections than the unprotected network so that it will be able to access other shared devices the next time it's brought to the office. HTH. Mike ~~~~~~~~~~~~~~~~~~~~~~ -----Original Message----- From: ProfoxTech [mailto:[email protected]] On Behalf Of Ted Roche Sent: Tuesday, February 23, 2016 4:39 AM To: [email protected] Subject: Re: [NF] Two DHCP servers on a network - Changed to [NF] On Tue, Feb 23, 2016 at 3:42 AM, Graham Brown <[email protected]> wrote: > > My thinking was if anything logs into the domain it will take the > server DHCP IP address range and wifi devices from the router DHCP IP range. > I think this is wishful thinking. On startup, the ethernet devices essentially broadcast a plea over the network, "Who can give me an IP address?" and pick one of the responders. IIRC, the first to answer, but no guarantee who. > It appears it is a bad idea to have 2 DHCP servers but not sure if > this will stop the tablets and smartphones getting a connection. It sounds like a bad idea to me. Is there a reason why you can't just turn off the DHCP server on the Win 2012 box? https://technet.microsoft.com/en-us/library/cc778064(v=ws.10).aspx -- Ted Roche Ted Roche & Associates, LLC http://www.tedroche.com [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://mail.leafe.com/mailman/listinfo/profox OT-free version of this list: http://mail.leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
