Hello,

Happy new year to everyone. For those interested to use their Omada switch to facilitate intervlan routing rather than their Gateway, you can do the following:

Edit update note:

• You will still need an Internet Gateway, it will not replace your Gateway

• Layer 3 Switch can't do VPN server/client or any of the fancy WAN features (i.e. port forward) as well as LAN features (i.e. no mDNS).

• Not tested on many switches. Check your specs and clients.

Steps:
1. Get your Omada Switch's IP Address
    Devices > IP Addresss
2. Create a Layer 2-Broadcast-only VLAN 
    Settings > Wired Networks > LAN > Create New LAN
        Name: <Enter value>
        Purpose: VLAN
        VLAN ID: <Enter value>
        Application: Switches Only
        "Save"!
3. Configure Switch VLAN Interface 
    Devices > [Switch] > Config > VLAN Interface > Enable > Edit
        IP Address Mode: Static
        IP Address: <Enter value>
        Subnet Mask: <Enter value>
        DHCP Mode: DHCP Server
        DHCP Range: <Enter range>
        Primary DNS: <Enter value>
        Secondary DNS: <Enter value>
        Default Gateway: <Enter value>
        "Apply"
        "Apply" again!
4. Allow traffic to Gateway 
    Settings > Transmission > Routing > Static Route > Create New Route
        Name: <Enter value>
        Status: Enable
        Destination IP/Subnet: <Enter values created in Step 3>
        Route Type: Next Hop
        Next Hop: <Enter value from Step 1>
        "Create"

Testing:

• Configure switch port with the VLAN profile defined as Gateway Interface. Plug device and ping any IP created from Step 3
• Configure a switch port with the VLAN profile created from Step 2. Plug device, device should have IP address coming from range defined from Step 3
• Configure a switch port with the VLAN profile created from Step 2. Plug device and browse the net

If you want to see this in action or prefer a video guide, I have a video posted in YT, configuration starts at 13:57. This is an experimental design, not recommended for production.