Thanks for the reply.
Sorry I forgot to mention, yes I have 2 different gateways in two different subnets on the same interface.
I have tried to fiddle a litte with VLAN’s but it’s been a while, I couldn’t make it work as I’m doing
GW1
--------------untagged,no vlan-------------RouterBoardETH1
GW2
On that scenario I have to get the RB to tag the ingress packets and untag back to a couple of bridges inside that same eth1… or something like that. I’m a bit rusty with VLANs and I’m thinking it might be overkill for my situation so I’m considering just implementing recursive without script instead, although I really like the toggle functionalities of your script.