QoS and ACK packets

[Djoss]

Some users already asked the question before, but I did not find a clear answer.

So the questions are:

• - What happen to outgoing ACK packets?
  - In which class those packets are going to?
  - Do we need to create a rule for those packets on the upload side?
  - If yes, how should we create this rule?

Take the case where there is a rule to put HTTP download in a fast class. When the upload link is saturated, how do I make sure that TCP ACKs generated by the download gets higher priority than other upload traffic?

[blueacid]

Tcp ack packets are 64 bytes long. Therefore you can create a rule for any tcp packet of 64 bytes to get a high priority.

[Djoss]

Thanks for your answer.

So basically, I guess that rule for ACK packet is required to make sure that the download side is not affected by upload traffic having less priority.

[pbix]

Folks,

I added
http://www.gargoyle-router.com/wiki/dok ... re_special
and
http://www.gargoyle-router.com/wiki/dok ... s_priority
to the QoS Wiki to help folks with these commonly miss-understood subjects.

In response to the OP's other question, pretty much all classes require rules to route traffic into them. To route HTTP traffic into a class in the uplink we set the destination port to 80 in the corresponding rule.

[Djoss]

Thank you very much. I think it should now be clear