QOS with Mikrotik [Reference Guide]

QOS With Mikrotik

Following are few scenarios for some examples : I will add more soon,

1# Limit user traffic using PCQ (also useful for Hotspot Bypassed MAC address)

To limit all users 192.168.1.0/24 to 512kb epr user, using PCQ, use following script.

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/queue type   add kind=pcq name=download-512kb pcq-burst-rate=0 pcq-burst-threshold=0 pcq-burst-time=10s pcq-classifier=dst-address pcq-dst-address-mask=32 pcq-dst-address6-mask=64 pcq-limit=50 pcq-rate=524288 \ pcq-src-address-mask=32 pcq-src-address6-mask=64 pcq-total-limit=2000   add kind=pcq name=upload-512kb pcq-burst-rate=0 pcq-burst-threshold=0 pcq-burst-time=10s pcq-classifier=src-address pcq-dst-address-mask=32 pcq-dst-address6-mask=64 pcq-limit=50 pcq-rate=524288 \ pcq-src-address-mask=32 pcq-src-address6-mask=64 pcq-total-limit=2000   /queue simple add burst-limit=0/0 burst-threshold=0/0 burst-time=0s/0s comment="Limit every Users at 512kb using PCQ. Can be used for hotspot BYPASSED macs too. Can be used for multi purpose  Syed Jahanzaib" \ direction=both disabled=no interface=all limit-at=0/0 max-limit=0/0 name=512k-limit packet-marks="" parent=none priority=8 queue=upload-512kb/download-512kb target-addresses=192.168.1.0/24 \ total-queue=default-small

Change the Bandwidth and Target IP addresses to meet your local requirements.
Bandwidth example:
512k = 524288
1mb = 1048576
2mb = 2097152
4mb = 4194304
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Result as showed in the image below . . .

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1# Allowing specific extension Low Priority over other traffic

In this example we are marking traffic via mangle rules. .iso extension is marked as low priority traffic , and all other traffic is marked as hi priority traffic.
For example We have 256kb internet bandwidth in total. and we want that when users are downloading any .iso file, it gets low priority over other traffic i.e browsing etc. Use the following.

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/ip firewall mangle   add action=mark-connection chain=postrouting comment="Mark Conn for .iso Ext" content=iso disabled=no new-connection-mark=iso-conn passthrough=yes   add action=mark-packet chain=postrouting comment="Mark Pkts for iso-conn Ext" connection-mark=iso-conn disabled=no new-packet-mark=lo-prio-traffic-pkts passthrough=no   add action=mark-connection chain=postrouting comment="Mark Conn for all other traffic" content=!iso disabled=no new-connection-mark=hi-prio-traffic-conn passthrough=yes   add action=mark-packet chain=postrouting comment="Mark Pkts for all other traffic" connection-mark=hi-prio-traffic-conn disabled=no new-packet-mark=hi-prio-traffic-pkts passthrough=no   /queue simple add name=wan_conn_limit interface=ether1 max-limit=256k/256k   /queue simple add name=hi-prio-traffic interface=ether1 parent=wan_conn_limit packet-marks=hi-prio-traffic-pkts priority=1   /queue simple add name=lo-prio-traffic packet-marks=lo-prio-traffic-pkts interface=ether1 parent=wan_conn_limit priority=8

1# Allowing Specific File Extensions High / Limited / Unlimited Bandwidth

For example, You have a network and every user have there bandwidth limited at 256kb. Now you want that if a user is downloading .FLV video file , He can view/download it at unlimited speed regardless of his allowed speed limit, i.e 256kb package, Use the following.
First mark all packets with .flv extention.

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/ip firewall mangle add action=mark-connection chain=postrouting comment="Mark Conn for .flv Ext" content=flv disabled=no new-connection-mark=flv-conn passthrough=yes   add action=mark-packet chain=postrouting comment="Mark Pkts for flv-conn Ext" connection-mark=flv-conn disabled=no new-packet-mark=flv passthrough=no

Now Create a Queue Tree and Set Unlimited or Limited Bandwidth (OR As per your requirements if you want to allot specific amount, set it) to Marked Packets

1 2	/queue tree add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=100M max-limit=100M name=Unlimited-Speed-4-Marked-Pkts packet-mark=flv parent=global-out priority=1 queue=defaul

You can use the same in reverse to limit specific extension type bandwidth usage.

2# Allowing Specific Ports High Priority over other traffic

First we need to mark protocols. (In this example we are using SMTP port 25 )

1 2	/ip firewall mangle add chain=prerouting protocol=tcp port=25 connection-state=new action=mark-connection new-connection-mark=hi_prio_conn /ip firewall mangle add chain=prerouting connection-mark=hi_prio_conn action=mark-packet new-packet-mark=hi_prio_conn_pkts

Now we will create Simple Queue and give high priority to marked packets and other packets low priority. (In this example we have 2Mb WAN connection)

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/queue simple add name=wan_conn_limit interface=ether1 max-limit=2M/2M /queue simple add name=prio interface=ether1 parent=wan_conn_limit packet-marks=hi_prio_conn_pkts priority=1 /queue simple add name=other interface=ether1 parent=Internet priority=8

Now SMTP traffic will get higher priority over other traffic.

3# Equal Distribution of Bandwidth for a number of users using PCQ

If you have a 512 kbps WAN connection and you want to share this equally among your users  but if only one pc is active it should have the full 512 kbps, if 2 pcs are active 256 kbps each and vise versa.
As shown in the image below . . .


Use the following:

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/queue type add name="PCQ_download" kind=pcq pcq-rate=512k pcq-classifier=dst-address /queue type add name="PCQ_upload" kind=pcq pcq-rate=512k pcq-classifier=src-address   /queue simple add queue=PCQ_upload/PCQ_download target-addresses=192.168.2.0/24

4# Limiting Single User Bandwidth via Simple QUEUE (Lookout for order number)

1	/queue simple add name="Limiting Zaib to 256kb" target-addresses=192.168.2.6 max-limit=256k/256k

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