program automatic test (router_io.tb rt_io);
/* program automatic test (router_io.tb rt_io); */
    import router_test_pkg::*;
    Environment env;
    initial begin
        $timeformat(-9, 1, "ns", 10);
        env = new("env", rt_io);
        env.configure();
        pkt_cnt = env.pkt_cnt;
        env.run();
    end
endprogram : test