Issue IPs to wireless devices from my Server rather than the SOHO

How to setup a wifi network with SOHO router plugged into switch and get IPs issued from DC hosting DHCP server so wireless devices can communicate with wired devices?

I have a Server running Server 2012 R2 that provides DHCP services to the devices wired directly to our switch. If I have the WIFI SOHO plugged into the switch to get an IP on the same VLAN as the wired devices how can I direct my wireless devices to point to the DHCP server to receive the IPs rather than the wifi router providing this service?

Cisco 2811 Router
Cisco 3560 Switch
Windows Server 2012 r2 DC with DHCP server
VLAN 10
WIFI Router Plugged into switch on VLAN 10
LVL 3
Brandon MacAsked:
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CompProbSolvCommented:
If it is an access point (and not a wireless router) then wireless devices will automatically get DHCP from the server as long as they are on the same VLAN and there is no other DHCP server.  Disable DHCP on the router.

If what you are calling an access point is really a router (does it have a WAN port?) then you need to reconnect it as an Access Point.  Ask for details if this is the case.
Brandon MacAuthor Commented:
The device can possibly be configured as an access point but it is a wifi SOHO with DHCP built in and it issues IPs. It has 1 WAN and 4 LAN ports. I have it currently plugged into WAN port and plugged into VLAN 10 it receives an IP and then by default the configs setup another network and the WIFI router issues IPs for those devices connecting. Example below

WIFI plugged into switch on WAN port VLAN 10 gets IP of 10.1.1.101 /24 and then its network that it hosts is
192.168.1.1 /24 and it will issue ips to devices on its own network.

So if I can't change it into an access point what are the steps required ? If i can make it an access point are there different steps ?

Thanks for your assistance
JohnBusiness Consultant (Owner)Commented:
I have it currently plugged into WAN port and plugged into VLAN 10

Plug a LAN port form this device to your network and turn DHCP OFF. Then devices will get DHCP from your network.
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Brandon MacAuthor Commented:
So John your saying don't use the WAN port ?
JohnBusiness Consultant (Owner)Commented:
Yes. Internally that, hook up LAN to LAN . I do these hookups quite a bit.

LAN to WAN will normally provide a different subnet and is only useful for separating connections, not integrating connections.

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Brandon MacAuthor Commented:
So what If i were to put the SOHO on VLAN 12 instead and ensure that the router knew the routes to both VLAN could the WIFI and Wired still communicate but be separated by being on a different subnet ?
JohnBusiness Consultant (Owner)Commented:
Yes that should work as well.
Brandon MacAuthor Commented:
I'm trying to bring the communication of the 2 separate networks together but was wondering for security if I should isolate to separate vlans but it will still allow them to see one another and communicate right
JohnBusiness Consultant (Owner)Commented:
If the devices need security like that, yes. Otherwise keep on the main network.

I do the latter because we have wireless devices properly on the main network.
CompProbSolvCommented:
John is on the right track.  Set the LAN address with something compatible with the subnet of the LAN on the main router.  Turn off DHCP on the Access Point/Router.  Connect it to the main LAN with a cable from a LAN port.  Nothing should be connected to the WAN port.
nociSoftware EngineerCommented:
but it is a wifi SOHO
SOHO meaning Small Office Home Office .... this makes no sense at all...
if you meant "but it is a wifi SOHO router"  it does...  SOHO is a prefix for all kinds of equipment (printers, fax, scanner, router, ..._)
(or a rough neighbourhood in London ....)
First Q: do you have a SINGLE LAN network - if so not a lot of trouble... just disable DHCP on the router and enable on your server.

If you have a Multi (V)LAN network there may be a problem.    The router will need to be able to supprto DHCP -relay  or DHCP-helper.

Any Wifi router can be used as AP on a LAN (most configs) have the Wifi connected to the LAN. So just connecting  the LAN port to the network and disable DHCP on the router should work. (and enable DHCP n your server).
Brandon MacAuthor Commented:
Thanks John you put me on the right track got it all figured out.
Brandon MacAuthor Commented:
Great help from the both of you thanks
JohnBusiness Consultant (Owner)Commented:
You are very welcome and I was pleased to assist you.
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