MYX_RXBIG_SIZE
if (myx_rx_init(sc, MYX_RXBIG, MYX_RXBIG_SIZE) != 0)
MEXTADD(m, mcl, MYX_RXBIG_SIZE, M_EXTWR, MEXTFREE_POOL, myx_mcl_pool);
m->m_len = m->m_pkthdr.len = MYX_RXBIG_SIZE;
m_pool_init(myx_mcl_pool, MYX_RXBIG_SIZE, MYX_BOUNDARY,
ifp->if_hardmtu = MYX_RXBIG_SIZE;
ifr[1].ifr_size = MYX_RXBIG_SIZE;