I can help if you can better explain your topology. I have my vMX with its own Elastic IP assigned to the EC2 and an IGW for outbound. What does the route table look like in the VPC/subnet where your vMX is?

I've created a VPC with it's own egress path. I have my vMX in Passthrough mode. I have defined local subnets in vMX (AWS Subnets with VPC routes pointed to the TGW) and I have a summarized route in my VPC route table pointed at the vMX ENI. I also a...

Any chance you can provide guidance on your VPC/TGW routing? I have a vMX vpc with the appliance set up. Cant figure our which mode to use and how to configure routing to enable bidirectional flow.