Sieci bezprzewodowe, sieci radiowe, radiolinie, Wi-Fi, wlan, WiMAX, wirelesslan, karty sieciowe, punkt dostępowy, access point, sieć bezprzewodowa, anteny 2,4 GHz, mikrotik, sieci wimax, wifi

Queue trees can be used for more sophisticated applications where you need to limit traffic for specific users, protocols, ports etc.

You can see how we will share the traffic in the picture (the network 192.168.0.0/24 is masqueraded):

At first, mangle the HTTP, FTP and POP3 download traffic. As our network 192.168.0.0/24 is masqueraded, we need to mark the outgoing connection with mark-connection parameter:

/ip firewall mangle
add in-interface=Local dst-address=:80 protocol=tcp action=passthrough
    mark-connection=http-con comment="" disabled=no
add in-interface=Local dst-address=:110 protocol=tcp action=passthrough
    mark-connection=pop3-con comment="" disabled=no
add in-interface=Local dst-address=:21 protocol=tcp action=passthrough
    mark-connection=ftp-con comment="" disabled=no

and only then we can mark the downstream traffic with a flow mark:

/ip firewall mangle
add protocol=tcp connection=http-con action=passthrough mark-flow=HTTP
    comment="" disabled=no
add protocol=tcp connection=pop3-con action=passthrough mark-flow=POP3
    comment="" disabled=no
add protocol=tcp connection=ftp-con action=passthrough mark-flow=FTP
    comment="" disabled=no

When we have marked the packets with a flow-mark, we can use them to build a queue tree.

Add a queue that will guarantee 80% of all available (512kbps) bandwidth, which is 409,6kbps, for HTTP service and if there is more bandwidth available (some services are idle), use it:
```
/queue tree
add name="http-queue"
parent=Local flow=HTTP limit-at=409600 max-limit=512000
```
Add a queue that will guarantee 15% (76,8kbps) for FTP:
```
/queue tree add name="ftp-queue"
parent=Local flow=FTP limit-at=76800 max-limit=512000
```
Now add a queue that will guarantee 5% (25,6kbps) of all available bandwidth to POP3 service. Set the priority for this service to 7. It means that this queue will have a higher priority than the previous ones (by default the priority is 8) so it will be processed before http-queue and ftp-queue:
```
/queue tree
add name="pop3-queue"
parent=Local flow=POP3 limit-at=25600 max-limit=512000
priority=7
```
The benefit from higher priority is that POP3 traffic, as it will be processed first, will have the smallest delay going through the router from all services.

Using limit-at and max-limit parameters, you can control the minimum guaranteed and maximum allowed bandwidth for a service. At first, the limit-at data rate is achieved, then, if more bandwidth is available, it is used by this service (up to 512kbps in this example).

Note: for a correct queue tree setup the amount of limit-at values for queue tree leaves (queues which have no child-queues) must be equal (or lower) to available bandwidth. In this case 25,6kbps + 76,8kbps + 409,6kbps = 512kbps.

How to guarantee and prioritize traffic?

Description