VTNET_RX_SEGS_LRO_NOMRG
sc->vtnet_rx_nsegs = VTNET_RX_SEGS_LRO_NOMRG;
CTASSERT(((VTNET_RX_SEGS_LRO_NOMRG - 1) * MCLBYTES) >= VTNET_MAX_RX_SIZE);