When in a network environment with two unique gateways, certain devices (such as security cameras) might need to have their traffic sent to a particular gateway. To accomplish this, follow the instructions below.
1. Create a VPN concentrator or use an MX as the concentrator to tunnel traffic to and set it up on the desired subnet.
2. Set up an SSID on the MR network in Bridge Mode and select to "Tunnel traffic to..." the concentrator you created in Step 1.
3. Connect clients to the concentrator SSID.
Clients connected to this SSID will now have all of their traffic tunneled to the VPN concentrator.
For more information about the VPN concentrator, please consult this documentation.