[ixp1200] Connectivity problems

Hi, What kind of cabling is needed to connect the 10/100 ethernet ports on the IXP1200 to an ethernet card on another PC? I tried CAT-5 crossover cable but the LEDs on either card do not come on. I also tried straight through cable. The orange LED on the IXP ethernet port blinks and the Link LED on the other card also blinks, but it seems that connectivity is not fine. Should the ports be explicitly brought up? I only added the MAC and IP addresses of the two machines that I am trying to connect via the IXP1200 to the route cache in ipmm.c. Ping from either machine does not work and debug output on IXP's serial port does not seem to indicate any packet reception. Thanks, Magesh