I implemented lwip in ADI BF527 DSP on a customized board. The Ethernet communication is fine between the board and the PC. However, if i connect the board and pc via a linksys switch, there is no communication at all. I am sure there is no physical connection problem. i suspect it might be related to lwip stack as the old platform which used KwikNet TCP/IP Stack from Kadak didn't have this issue. Do you guys have any idea on that? Thanks.