@cnoyes1972 It does seem like a missing feature. I ended up giving up and running my own DHCP server and it seems to work fine with that. It's annoying but it turned out to be a blessing in disguise....

I'm trying to setup my SDN to match the settings I have locally on my ER605. On the ER605 I can configure the LAN network to use a DHCP relay to point to my local DHCP server. On the SDN there's an...