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:lastproofread: 2023-02-18
.. _examples-qos:
###########
QoS example
###########
Configuration 'dcsp' and shaper using QoS
=========================================
In this case, we'll try to make a simple lab using QoS and the general ability of the VyOS system.
Before we recommend you noticed the main article about QoS
| :ref:configuration/trafficpolicy/index:qos
Using the general schema for example:
.. image:: /_static/images/qos1.png
:width: 80%
:align: center
:alt: Network Topology Diagram
We have four hosts on the local network 172.17.1.0/0. All hosts are labeled CS0 by default. We need to replace labels on all hosts except vpc8.
We will replace the labels on the nearest router “VyOS3” using the IP addresses of the sources.
* 172.17.1.2 CS0 -> CS4
* 172.17.1.3 CS0 -> CS5
* 172.17.1.4 CS0 -> CS6
* 172.17.1.40 CS0 by default
Next, we will replace only all CS4 labels on the “VyOS2” router.
* CS4 -> CS5
In the end, we will configure the traffic shaper using QoS mechanisms on the “VYOS2” router.
Configuration:
==============
Set IP addresses on all VPCs and a default gateway 172.17.1.1. We'll use in this case only static routes.
On the VyOS3 router, we need to change the 'dscp' labels for the VPCs. To do this, we use this configuration.
.. code-block:: none
set interfaces ethernet eth0 address '10.1.1.100/24'
set interfaces ethernet eth0 traffic-policy out 'vyos3'
set interfaces ethernet eth1 address '172.17.1.1/24'
set protocols static route 0.0.0.0/0 next-hop 10.1.1.1
set traffic-policy shaper vyos3 class 10 match ADDRESS10 ip source address '172.17.1.2/32'
set traffic-policy shaper vyos3 class 10 set-dscp 'CS4'
set traffic-policy shaper vyos3 class 20 match ADDRESS20 ip source address '172.17.1.3/32'
set traffic-policy shaper vyos3 class 20 set-dscp 'CS5'
set traffic-policy shaper vyos3 class 30 match ADDRESS20 ip source address '172.17.1.4/32'
set traffic-policy shaper vyos3 class 30 set-dscp 'CS6'
set traffic-policy shaper vyos3 default bandwidth '10%'
set traffic-policy shaper vyos3 default ceiling '100%'
set traffic-policy shaper vyos3 default priority '7'
set traffic-policy shaper vyos3 default queue-type 'fair-queue'
Main rules:
* ADDRESS10 change CS0 -> CS4 source 172.17.1.2/32
* ADDRESS20 change CS0 -> CS5 source 172.17.1.3/32
* ADDRESS30 change CS0 -> CS6 source 172.17.1.4/32
Check the result
.. image:: /_static/images/qos2.png
:width: 80%
:align: center
:alt: Network Topology Diagram
Before the interface eth0 on router VyOS3
.. image:: /_static/images/qos3.png
:width: 80%
:align: center
:alt: Network Topology Diagram
After the interface eth0 on router VyOS3
.. image:: /_static/images/qos4.png
:width: 80%
:align: center
:alt: Network Topology Diagram
On the router, VyOS4 set all traffic as CS4. We have to configure the default class and class for changing all labels from CS0 to CS4
.. code-block:: none
set interfaces ethernet eth0 address '10.2.1.100/24'
set interfaces ethernet eth0 traffic-policy out 'vyos4'
set protocols static route 0.0.0.0/0 next-hop 10.2.1.1
set traffic-policy shaper vyos4 class 10 bandwidth '100%'
set traffic-policy shaper vyos4 class 10 burst '15k'
set traffic-policy shaper vyos4 class 10 match ALL ether protocol 'all'
set traffic-policy shaper vyos4 class 10 queue-type 'fair-queue'
set traffic-policy shaper vyos4 class 10 set-dscp 'CS4'
set traffic-policy shaper vyos4 default bandwidth '10%'
set traffic-policy shaper vyos4 default burst '15k'
set traffic-policy shaper vyos4 default ceiling '100%'
set traffic-policy shaper vyos4 default priority '7'
set traffic-policy shaper vyos4 default queue-type 'fair-queue'
Next on the router VyOS2 we will change labels on all incoming traffic only from CS4-> CS6
.. image:: /_static/images/qos5.png
:width: 80%
:align: center
:alt: Network Topology Diagram
.. code-block:: none
set interfaces ethernet eth0 address '10.1.1.1/24'
set interfaces ethernet eth1 address '10.2.1.1/24'
set interfaces ethernet eth2 address '10.9.9.1/24'
set interfaces ethernet eth2 traffic-policy out 'vyos2'
set protocols static route 172.17.1.0/24 next-hop 10.1.1.100
set traffic-policy shaper vyos2 class 10 bandwidth '100%'
set traffic-policy shaper vyos2 class 10 burst '15k'
set traffic-policy shaper vyos2 class 10 match VYOS2 ip dscp 'CS4'
set traffic-policy shaper vyos2 class 10 queue-type 'fair-queue'
set traffic-policy shaper vyos2 class 10 set-dscp 'CS5'
set traffic-policy shaper vyos2 default bandwidth '100%'
set traffic-policy shaper vyos2 default burst '15k'
set traffic-policy shaper vyos2 default ceiling '100%'
set traffic-policy shaper vyos2 default priority '7'
set traffic-policy shaper vyos2 default queue-type 'fair-queue'
.. image:: /_static/images/qos6.png
:width: 80%
:align: center
:alt: Network Topology Diagram
* 172.17.1.2/24 CS0
.. image:: /_static/images/qos7.png
:width: 80%
:align: center
:alt: Network Topology Diagram
* 172.17.1.2/24 CS0 - > CS4
.. image:: /_static/images/qos8.png
:width: 80%
:align: center
:alt: Network Topology Diagram
* 172.17.1.2/24 CS4 - > CS5
.. image:: /_static/images/qos9.png
:width: 80%
:align: center
:alt: Network Topology Diagram
In the end, on the router “VyOS2” we will set outgoing bandwidth limits between the “VyOS3” and “VyOS1” routers. Let's set a limit for IP 10.1.1.100 = 5 Mbps(Tx). We will check the result of the work with the help of the “iPerf” utility.
Set up bandwidth limits on the eth2 interface of the router “VyOS2”.
.. code-block:: none
vyos@vyos2# show traffic-policy shaper vyos2 class 20
bandwidth 5mbit
description "for VyOS3 eth0"
match VyOS3 {
ip {
source {
address 10.1.1.100/32
}
}
}
Check the result.
.. image:: /_static/images/qos10.png
:width: 80%
:align: center
:alt: Network Topology Diagram
As we see shaper is working and the traffic will not work over 5 Mbit/s.
|
