Using DHCP with VLAN and OSPF

[markieceBreeding]

Hi there. I'm trying to figure out why my dhcp server is not working. Everything works statically and it works in the same switch but not in the other switched VLANs. Help please?

[Flavio Miranda · Accepted solution]

@markieceBreeding 

 I have found two issues on your project.

First on your DHCP server. The DHCP server´s gateway IP address is wrong. 

Second, you need to have the command "ip helpper-address" under every subinterface on routers  Core_Router1 US and 

Core_Router2 US

Attaching a working file

[markieceBreeding]

@Flavio Miranda Thank you so much. I wasn't sure if I should use the VLAN or the physical router gateway. I didn't realize the 'ip helper-address' command was required. Thank you again.

[Flavio Miranda]

@markieceBreeding  yes, the command is required because you have a router (layer3 device) between your PCs and your DHCP server. DHCP request is sent in broadcast and broadcast will not cross the router unless you config the "ip helper-address".