iptos IP TOS
port 端口
port-priority 端口+802.1p优先级
port-vlan 端口+VLAN
port-vlan-priority 端口+VLAN+802.1p优先级
priority 802.1p优先级
vlan VLAN
vlan-iptos VLAN+IP TOS
vlan-priority VLAN+802.1p优先级