If someone has time, I need a bit of advice as i'm having some problems with routing.
In brief, I have 2 networks connected together using a GRE tunnel (using RB750's at either end). The network on one end uses that same RB750 endpoint as the gateway to the WAN. The network on the other end uses a separate gateway for traffic. This gateway (172.16.1.3) is configured to route all traffic destined for the other network (10.1.0.0/16) to the next hop IP of the RB750 (172.16.1.1).
Here is a little diagram I made...
Thats all well and good and I can see that traffic going down the GRE tunnel using Torch, but I believe the problem comes with the return traffic. Eg: I can RDP to a server on the other network when the gateway of the client is set to the RB750, but I cant RDP to that same server when the gateway is set to the main gateway (172.16.1.3). The same is true when RDPing from the 10.1.0.0/16 network to the other (it will only work if 172.16.1.1 is set as the gateway).
Does anyone have any ideas? I will be very grateful if you do!
Thanks