Hi, If you are attempting to create a gre tunnel between the 2 routers and they route to each other via their WAN interfaces, then the tunnel source will be the WAN interface on both routers.
Thanks for the reply, the plan is to create multiple tunnel interfaces, each will be sourced from it`s own unique loopback interface and destination will be the loopback on the other side router. The loopbacks will have static routes pointing to the real-wan interface. In this case will the Tunnel interfaces still logically face the WAN side even though they are been sourced from the loopbacks?
Have you considered DMVPN? You can have 1 tunnel interface on a hub router, configuration will be much simplier, it will use NHRP to map the tunnel address to the nbma/public ip address. You can use statics or a dynamic routing protocol.
Yes, we looked into that BUT our use case is DCI. We are interconnecting 2 x datacentres to serve multi-tenancy. This way we can have separate tunnel interface (in its own vrf) per tenant and then do traffic-shaping or policing on each tunnel. We will exchange the routes over the tunnel interfaces using BGP vpnv4 address family per VRF. What do you think?
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