VLAN_CFI
if (VLAN_CFI(tci) != ETHER_CFI || vlanid > VLAN_ID_MAX)
new_tci = VLAN_TCI(VLAN_PRI(tci), VLAN_CFI(tci), VLAN_ID_NONE);
evhp->ether_tci = htons(VLAN_TCI(pri, VLAN_CFI(old_tci), vid));
if (VLAN_CFI(mhip->mhi_tci) != ETHER_CFI)