Receiving a dhcp from windows server for a new vlan on an MX

[Announcer]

The main vlan10 is getting dhcp from my windows server 192.168.100.0/24. (Meraki option: do not respond to dhcp requests).  I have made a new dhcp scope on my windows dhcp server, say 192.168.150.0.24.  On the new vlan in Meraki - vlan20- would I put the option: relay dhcp to another server? (the windows dhcp server is  192.168.100.5)  How will the workstations on vlan20 know which ip range to grab from the windows server?

[alemabrahao]

Just configure the DHCP relay pointing to your Windows IP and everything will work fine.

For more details consult the documentation.

https://documentation.meraki.com/MX/DHCP/Configuring_DHCP_Relay

[Announcer]

Thankyou, but what will prevent the client from receiving a .100 address (main scope)  and not a .150 address (new scope)?  I guess it gets it from the vlan interface IP when I created the vlan in the MX?

[alemabrahao]

Tagging the correct VLAN on the switch port where the client is connected or on the SSID in the case of WiFi. Very simple. 😉

[alemabrahao]

It would be interesting for you to read the documentation and understand what a broadcast domain is.

[PhilipDAth]

When the switch forwards a DHCP packet it includes the layer 3 interface IP address where the original DHCP packet was received.  This lets the DHCP server know which subnet it came from.