Hi @ccnp.manami ,
As @lagapidis mentioned, the way BFD works is that you configure this on an interface level. Static routes, or routing protocols like OSPF, EIGRP, BGP, and IS-IS can use BFD for faster failover.
You would configure BFD once for your BE10 interface. If you have another interface between DC-GW1 and the Telco, you can configure BFD for this interface as well.
For these two interfaces, you can use different BFD intervals if needed.
Rene