The topology above will have a DHCP server and relay setup. Host is going to be a DHCP client, R4 will be the DHCP server, and R6 will be our forwarder.
On R4 a DHCP pool has been configured for VLAN 10, the subnet in between R6 and eventually the host.
On the sub interface connecting to the host, we’ll need to add an IP helper statement towards the DHCP server, which allows DHCP requests to transit over L3 links.
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