My customer has an 1841 router. FE0/0 connects to his LAN. FE0/1 connects to another ISP, call ISP-A, 2M internet link. He want another 2M from u, ISP-B with load balancing. Can we use same 1841 router with V.35 interface connection and load sharing internet traffic for both ISP-A & ISP-B. Cutomer doesn't have his own IP Block. Without BGP can we do using NAT configuration?