> 2) the manpage refers to NR_RING_NIC_SW when I think it means > NR_REG_NIC_SW. Found another. 2a) manpage refers to NR_REG_SW_NIC when the include file has NR_REG_SW To summarize: manpage include NR_REG_ALL_NIC NR_REG_SW_NIC NR_REG_SW NR_RING_NIC_SW NR_REG_NIC_SW NR_REG_ONE_NIC NR_REG_PIPE_MASTER NR_REG_PIPE_SLAVE Mark.