Interplay between routing and forwarding routing algorithm local forwarding table header value output link 0100 0101 2 0111 1001 value in arriving packet's header 0111 Network Layer 4-6Network Layer 4-6 1 2 3 0111 value in arriving packet’s header routing algorithm local forwarding table header value output link 0100 0101 0111 1001 3 2 2 1 Interplay between routing and forwarding