I'm trying to update my office's LAN. I've got two L2 access switches connected to two L3 distro switches which is connected to my edge router. My question is how to setup DHCP. Currently the router is acting as the DHCP server. Would I setup the ip helper address on my distro switches? I read that you can only configure the ip helper address on L3 interfaces... so would I configure it on the router uplink, or should my interfaces to the access switches be L3 as well? I'm starting to get confused on what should be L3 and how DHCP would be setup.
Any help would be greatly appreciated.