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About the Application QoS Page

You are here: Network > Application QoS.

Application quality of service (AppQoS) provides the ability to prioritize and meter application traffic to provide better service to business-critical or high-priority application traffic.

The AppQoS feature expands the capability of Junos OS class of service (CoS) to include marking DSCP values based on Layer-7 application types, honoring application-based traffic through loss priority settings, and controlling transfer rates on egress Physical Interface Cards (PICs) based on Layer-7 application types.

Use this page to add, edit, clone, and delete an AppQoS profile and a rate limiter profile.

Tasks You Can Perform

You can perform the following tasks from this page:

  • Add an AppQoS profile. See Add an Application QoS Profile.

  • Edit an AppQoS profile. See Edit an Application QoS Profile.

  • Clone an AppQoS profile. See Clone an Application QoS Profile.

  • Delete AppQoS profile. See Delete Application QoS Profile.

  • Add a rate limiter profile. See Add a Rate Limiter Profile.

  • Edit a rate limiter profile. See Edit a Rate Limiter Profile.

  • Clone a rate limiter profile. See Clone a Rate Limiter Profile.

  • Delete rate limiter profile. See Delete Rate Limiter Profile.

  • Show or hide columns in the AppQoS Profile or Rate Limiter Profile table. To do this, click Show Hide Columns icon in the top right corner of the page and select the columns you want to display or deselect to hide columns on the page.

  • Advanced search for an AppQoS or rate limiter profile. To do this, use the search text box present above the table grid. The search includes the logical operators as part of the filter string. An example filter condition is displayed in the search text box when you hover over the Search icon. When you start entering the search string, the icon indicates whether the filter string is valid or not.

    For an advanced search:

    1. Enter the search string in the text box.

      Based on your input, a list of items from the filter context menu appears.

    2. Select a value from the list and then select a valid operator based on which you want to perform the advanced search operation.


      Press Spacebar to add an AND operator or OR operator to the search string. Press backspace to delete a character of the search string.

    3. Press Enter to display the search results in the grid.

Field Descriptions

Table 1 describes the fields on the Application QoS page.

Table 1: Fields on the Application QoS Page



AppQoS Profile


Displays the AppQoS profile name.

Traffic Direction

Displays whether the traffic direction is client-to-server and server-to-client.


If the same rate limiter profile is associated with client-to-server and server-to-client traffic, then Both status will be displayed.

Rate Limiter

Displays the rate limiter profile name.

Forwarding Class

Displays the forwarding class name.

Rate Limiter Profile


Displays the rate limiter profile name.

Maximum Bandwidth

Displays the maximum bandwidth (in Mbps) to be transmitted for the rate limiter.

Maximum Burst Size

Displays maximum burst size (in MB) to be transferred in a single burst or time-slice.

Associated AppQoS Profile

Displays the AppQoS profile name associated with the rate limiter profile.