Hi,
This is a slightly changed design in forwarding instance-type as interfaces cannot be configured under forwarding instance.
Then the WAN [to MPLS] interfaces would be inet.0?
I am still trying to understand the requirement for routing-instances. How is the outbound traffic [from Branch to HQ] being routed? Is it through Filter Based Forwarding / policy based routing? If not, am not sure what the RIs are being used for.
Do you have a topology you could share for what you trying to achieve.
Cheers,
Ashvin