DHCP Relay on OpenWrt

[naseweis]

Hi,

I'am a trainee in IT and building a Testlab. I have to Networks:

Server Network 10.0.100.0 /24
Client Network 10.0.10.0 /24 Client network

How i manage that the Clients will get their Info from the DHCP Server sitting at 10.0.100.100? Open WRt version is : 22.03.3

I browsed the web but din't found anything matches. Thx for your answer!

[d687r02j8g]

Your DHCP server should have an interface on the network you want it to serve DHCP address.

Alternatively

DHCP Forwarder/DHCP Relay

Just thought I'd give an update to say I've managed to get this working. I updated to the latest OpenWRT build prior to doing all of this, as I'd read somewhere that DHCP Relay wasnt working in DNSMasq until a really recent version. I was on 19.07.2 previously, so it was a year old. At first I couldn't get this working via DNSMasq, and I even tried the isc-dhcp-delay package, I could see the discovers and offers coming into the DHCP server on the subnet at the other end of the site to site VP…

[trendy]

Don't use .0 as IP address. Start from .1 instead.

[naseweis]

thx for your replies i try this out later

[eduperez]

This is a bit confusing... Why do you need to have clients on the 10.0.10.0 network to use a DHCP server on the 10.0.100.0 network? Wouldn't it be easier to have a DHCP server on the 10.0.10.0 network? Is the DHCP server aware of the two networks, and configured properly?