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    Configuring QoS

    Quality of service (QoS) tools allow management of data traffic to reduce packet loss, latency and jitter on a network. This improves the user experience and ensures that important traffic gets the necessary bandwidth while less critical or non-essential traffic is limited.

    The Airlink OS router controls and manages network resources by setting priorities for specific data on the network. The QoS tools available in AirLink OS are traffic classifiers, bandwidth policies, interface service policies and thermal mitigation policies.

    To configure QoS settings, go to Networking > Quality of Service (QoS)

    To create a complete QoS policy, you must

    1. Create one or more Traffic Classifiers.
    2. Create one or more Bandwidth Policies.
    3. Optionally create one or more Interface Service Policies that include your configured Bandwith Policies.

    Initializing Table Of Contents...

    Traffic Classifiers

    Traffic classifiers allow you to analyze and identify the types of traffic to which you want to apply QoS.

    To create a Traffic Classifier, click CREATE CLASSIFIER.

    Configure the following settings as required by your application. Only a Classifier Name is required to create a valid traffic classifier. If you do not modify the default settings, all traffic will be included in the traffic classifier.

    SETTING DESCRIPTION DEFAULT SETTING RANGE
    CLASSIFIER NAME Name of the Classifier n/a n/a
    DESCRIPTION Description of the traffic classifier for your own use. Appears in the Traffic Classifiers table. n/a n/a
    PRIORITY Priority of the Classifier. If there is more than one classifier attached to the same interface, the classifier with the lowest value will be processed first compared to the higher values. 0 0 is the highest priority
    IP VERSION IPv4 or IPv6 traffic type IPv4
    • IPv4
    • IPv6

    SOURCE IP The source IP address of the traffic Any/All Source IPs (if empty) Any/IP Address with network prefix
    DESTINATION IP The destination IP address of the traffic Any/All Destination IPs (if empty) Any/IP Address with network prefix
    DSCP Differentiated Services Code Point(DSCP) value of the IP traffic Any/All DSCP values (if empty)
    • af11
    • af12
    • af13
    • af21
    • af22
    • af23
    • af31
    • af32
    • af33
    • af41
    • af42
    • af43
    • cs1
    • cs2
    • cs3
    • cs4
    • cs5
    • cs6
    • cs7
    • default (Any/All DSCP values)
    • ef

    PROTOCOL Protocol field in the IP header Any
    • Any
    • TCP
    • UDP
    • ICMP
    • ICMPv6

    SOURCE PORT The source port in the TCP or UDP header Any/All Source Ports (if empty) Positive number
    DESTINATION PORT The destination port in the TCP or UDP header Any/All Destination Ports (if empty) Positive number
    ICMP TYPE The type value in the ICMP or ICMPv6 header Any/All ICMP types (if empty) 0 to 255
    ICMP CODE The code value in the ICMP or ICMPv6 header Any/All ICMP Codes (if empty) 0 to 254

    Bandwidth Policies

    A bandwidth profile defines how a particular traffic classifier should be treated, such as assigning a Maximum Download or Upload Bandwidth Rate, etc. You can create a particular bandwidth restriction for a given service or traffic type using the Traffic Classifier Table and the Bandwidth Profile Table.

    To create a Bandwidth Policy, click CREATE BANDWIDTH PROFILE.

    Configure the following settings as required by your application. Only a Profile Name is required to create a valid bandwidth profile.

    SETTING DESCRIPTION DEFAULT SETTING RANGE
    PROFILE NAME Name of the Bandwidth Profile n/a n/a
    DESCRIPTION Description of the bandwidth profile for your own use. Appears in the Bandwith Policies table n/a n/a
    DOWNLOAD SETTINGS Enable when you want to set the maximum bandwidth for a particular traffic type in the Ingress direction. If enabled, you must specify the Download Max Bw. Disabled Disabled, Enabled
    DOWNLOAD MAX BW Specifies the upper limit of bandwidth during periods of high traffic. (Required if Download Settings is enabled). Enter in KBps (kilobytes per second) n/a 100 to 1000000
    UPLOAD SETTINGS Enable when you want to set the minimum and maximum bandwidth for a particular traffic type in the Egress direction. If enabled, you must specify the Upload Max Bw and Upload Min Bw. Disabled Disabled, Enabled
    UPLOAD MAX BW

    Specifies the upper limit of bandwidth during periods of high traffic (Required if Upload Settings is enabled). Enter in KBps (kilobytes per second).

    n/a 100 to 1000000
    UPLOAD MIN BW

    Specifies the minimum guaranteed bandwidth assigned to a traffic type during congestion (Required if Upload Settings is enabled). Enter in KBps (kilobytes per second).

    n/a 100 to 1000000
    CLASSIFIERS A list of classifiers that will have the same bandwidth treatment. More than one Traffic Classifier can be added if it needs the same bandwidth treatment. n/a select from list
    DSCP MARK SETTING Enable if you want to use DSCP Enabled Enabled, Disabled
    DSCP MARK VALUE DSCP mark Best Effort or DSCP 0, also known as Default
    • af11
    • af12
    • af13
    • af21
    • af22
    • af23
    • af31
    • af32
    • af33
    • af41
    • af42
    • af43
    • cs1
    • cs2
    • cs3
    • cs4
    • cs5
    • cs6
    • cs7
    • ef

    SCHEDULING PRIORITY

    This sets the priority for a classifier. One or more classifiers can have the same priority scheduling during congestion.

    Normal
    • Lowest
    • Low
    • Below Normal
    • Normal
    • Above Normal
    • High
    • Higher
    • Highest

    Interface Service Policies

    When you create an Interface Service Policy, you specify the maximum upload/download bandwidth. This is the quota or total upload/download bandwidth available on that interface. Each bandwidth policy gets a portion of that quota/total depending on what it defines as its maximum bandwidth and priority.

    When setting up an Interface Service Policy, bandwidth limitations should be based on measured network performance, not advertised network performance. If your QoS settings/limits exceed your actual network bandwidth, the policies will have no effect.

    To create an Interface Service Policy, click CREATE INTERFACE SERVICE POLICY.

    Configure the following settings as required by your application. Only an Interface Name is required to be selected to create a valid Interface Service Policy.

    Only interfaces that are enabled and operational will appear in the list.

    SETTING DESCRIPTION DEFAULT SETTING RANGE
    INTERFACE NAME Select a WAN interface to which the QoS settings will apply. n/a Only enabled and operating WAN interfaces will be in the list
    QOS State Enables or disables QoS on an interface Disabled Disabled, Enabled
    DOWNLOAD POLICING Enable this option if you want to apply a QoS policy on downloaded data traffic Disabled Disabled, Enabled
    DOWNLOAD MAX BW Rate limit on all the downloaded traffic. Required if Download Policing is enabled Number (in KBps) 100 to 1000000
    UPLOAD SHAPING Enable this option if you want to apply a QoS policy on uploaded data traffic Disabled Disabled, Enabled
    UPLOAD MAX BW Rate limit on all the uploaded traffic. Required if Upload Shaping is enabled Number (in KBps) 100 to 1000000
    PROFILE LIST Select one or more Bandwidth Policies

    Thermal Mitigation Policies

    A Thermal Mitigation Policy is automatically defined by the Airlink OS when certain conditions are met, allowing the device to continue to operate when it is approaching or exceeding its operating temperature limits. The thermal mitigation policy is applied to the interface and it will throttle the data throughput for optimal processing depending on how hot or cold the interface is.

    SETTING DESCRIPTION
    INTERFACE NAME Interface to which the QoS settings will apply
    QoS State Shows the state of the QoS
    DOWNLOAD POLICING Shows as enabled when a QoS policy is applied on downloaded data traffic
    DOWNLOAD MAX BW Shows the rate limit on all the downloaded traffic as calculated by the AirLink OS
    UPLOAD SHAPING Shows as enabled when a QoS policy is applied on uploaded data traffic
    UPLOAD MAX BW Shows the rate limit on all the uploaded traffic as calculated by the AirLink OS
    PROFILE LIST Lists one or more Bandwidth Policies that are being applied

    Implementation Considerations

    • Setting your bandwidth limitations should be based on tested network performance, not advertised network performance. The average or lowest reported values should be used. If your QoS settings/limits exceed your actual network bandwidth, the policies will have no effect.

    • Highest priority traffic is not always sent before all other traffic. Instead it is averaged over time. The highest priority traffic will receive its Upload Minimum Bandwidth, and as long as it is not excessive, other traffic will be transmitted or received. If the amount of high priority traffic exceeds the Upload Minimum Bandwidth, the excess traffic will still have to compete with other lower priority traffic for available bandwidth.

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