printf("\n output port not found %d next stop %d local router id %d group id %d intm grp id %d %d",output_port,next_stop,local_router_id,s->group_id,intm_grp_id,local_router_id%num_routers);
// printf("\n output port not found %d next stop %d local router id %d group id %d intm grp id %d %d", output_port, next_stop, local_router_id, s->group_id, intm_grp_id, local_router_id%num_routers);