Difference between revisions of "Manual:Queues - PCQ Examples"

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Per Connection Queue (PCQ) is a queuing discipline that can be used to dynamically equalize or shape traffic for multiple users, using little administration.  
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Per Connection Queue (PCQ) is a queuing discipline that can be used to dynamically equalize or shape traffic for multiple users, using little administration. It is possible to divide PCQ scenarios into three major groups: equal bandwidth for a number of users, certain bandwidth equal distribution between users, unknown bandwidth equal distribution between users.
  
 
== Equal Bandwidth for a Number of Users ==
 
== Equal Bandwidth for a Number of Users ==
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  /queue simple add queue=PCQ_upload/PCQ_download target-addresses=192.168.0.0/24
 
  /queue simple add queue=PCQ_upload/PCQ_download target-addresses=192.168.0.0/24
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== Certain Bandwidth Equal Distribution between Users==
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== Unknown Bandwidth Equal Distribution between Users==
  
 
[[Category:QoS]]
 
[[Category:QoS]]

Revision as of 16:08, 10 December 2007

Per Connection Queue (PCQ) is a queuing discipline that can be used to dynamically equalize or shape traffic for multiple users, using little administration. It is possible to divide PCQ scenarios into three major groups: equal bandwidth for a number of users, certain bandwidth equal distribution between users, unknown bandwidth equal distribution between users.

Equal Bandwidth for a Number of Users

Use PCQ type queue when you need to equalize the bandwidth [and set max limit] for a number of users. We will set the 64kbps download and 32kbps upload limits.

PCQ.png

There are two ways how to make this: using mangle and queue trees, or, using simple queues.

1. Mark all packets with packet-mark all:

/ip firewall mangle add chain=prerouting action=mark-packet new-packet-mark=all passthrough=no


2. Setup two PCQ queue types - one for download and one for upload. dst-address is classifier for user's download traffic, src-address for upload traffic:

/queue type add name="PCQ_download" kind=pcq pcq-rate=64000 pcq-classifier=dst-address
/queue type add name="PCQ_upload" kind=pcq pcq-rate=32000 pcq-classifier=src-address


3. Finally, two queue rules are required, one for download and one for upload:

/queue tree add parent=global-in queue=PCQ_download packet-mark=all
/queue tree add parent=global-out queue=PCQ_upload packet-mark=all

If you don't like using mangle and queue trees, you can skip step 1, do step 2, and step 3 would be to create one simple queue as shown here:

/queue simple add queue=PCQ_upload/PCQ_download target-addresses=192.168.0.0/24

Certain Bandwidth Equal Distribution between Users

Unknown Bandwidth Equal Distribution between Users