If you can't set static routes on it, you're going to have to do NAT on the ER.
Honestly, you might do better setting that thing to bridge mode, and using the ER as your main router.
If you can't set static routes on it, you're going to have to do NAT on the ER.
Honestly, you might do better setting that thing to bridge mode, and using the ER as your main router.