[ixp1200] When is LED of Ethernet turned on?

Hello. I have gotten many informations from VERA project source and this mailing list-source. Thanks! I have one Question. When is LED of Etherenet turned on? I think that after 'Eth_InitPort(i)', 'Eth_StartPort(i)' function is called, LEDs are turned on. But those are not turned on! What is problem? Broken? LEDs are turned on at any other time? Plz, answer. Thanks.