routeros 設定 小封包優先，以及dns 查詢優先

 /ip firewall mangle
add action=change-mss chain=forward comment="Clamp TCP MSS to PMTU" new-mss=\
    clamp-to-pmtu protocol=tcp tcp-flags=syn
add action=change-mss chain=output comment="Clamp TCP MSS to PMTU" new-mss=\
    clamp-to-pmtu protocol=tcp tcp-flags=syn
add action=mark-packet chain=prerouting comment="Mark small packets" \
    new-packet-mark=small_packet packet-size=0-500 protocol=tcp
add action=mark-packet chain=prerouting comment="Mark small UDP packets" \
    new-packet-mark=small_packet packet-size=0-500 protocol=udp
add action=mark-packet chain=prerouting comment="Mark DNS packets" dst-port=\
    53,853 new-packet-mark=dns_packet protocol=udp

 

 

tcp mss pmtu 自動設定pmtu 但不知道是否原本預設是不用了，只是設定，還是有流量

and icmp 看資訊是預設打開，這裡，還是無法瞭解到底是否是預設開或是null

 

size 0-500 小封包優先

udp 53 853 port 優先 

/queue tree
add max-limit=10M name=small_packets packet-mark=small_packet parent=global \
    priority=2
add max-limit=5M name=dns_priority packet-mark=dns_packet parent=global \
    priority=1

 

設定優先權  

相對比較有效果的設定