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Gene Weeg

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Help serving DHCP from windows server to 2 different VLANs

I am having issues with acquiring DHCP from our devices that are on VLAN 15.  Previously our DHCP server was a Mac Mini and it handed out the IPs to both VLAN 10 and 15 just fine.  All physical ports are VLAN 10.  I have 4 trunked ports that have VLAN 10 for Staff and VVLAN 15 for students that connect to our Ruckus APs.  Devices that connect to the Staff SSID get DHCP but those that connect to Student connect but do not get DHCP.  The only change is that I have gone from Mac server to Server 2012 for DHCP.  I created 2 separate scopes on the DHCP server.  Staff is 10.1..x to 10.11.11.x and Student is 10.41.2.x to 10.41.11.x.  No configuration changes were made to the network.  Just the addition of the Windows server doing DHCP.  Does anyone have any information that could point me in the right direction to serve DHCP to both VLANs?  Would the port that the Server connects to need to be trunked?


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check out this link, should help you configure windows DHCP for vlans.

https://www.virtualizationhowto.com/2021/05/windows-server-dhcp-vlan-configuration-detailed-guide/

LR

Does the Windows Server that is running as a DHCP server, require to have multiple NICs or just a single NIC is enough?
You only need 1 NIC on a DHCP server, even if it is servicing hundreds or thousands of scopes. That's why DHCP relay exists...to forward DHCP requests to the DHCP servers, even over WAN...   :-)
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Gene Weeg

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Thanks everyone for all your help.  The DHCP helper was the trick.