I want to add ipv6 support on my ecos board. It requires CYGINT_IO_ETH_MULTICAST , but I can't find it in 'common ethernet support' of 'I/O sub-system' , can anyone help me? Thanks. -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss