Hi Amit, I too faced the same problem, resolved it now. U should actually program the ready bus sequencer to get the packets into the rfifo(this is basically a 12 byte program) element. U can do this in two ways(may be more), 1) write opcode into rcv_rdy_ctl reg.(see hw_init() in layer3 forwarding example) 2) choose the instructions u want to place in the register from system conf>ix bus interface. Enable bus seq. Click program and select the instructions(see uCLab1 example). and that should do... Bye, D.Veluchamy, College of Engineering,Guindy, Chennai.