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Example: Configuring and Applying Scheduler Maps

This example shows how to configure and apply a scheduler map to a device’s interface.


Before you begin:


After you define a scheduler, you can include it in a scheduler map, which maps a specified forwarding class to a scheduler configuration. You configure a scheduler map to assign a forwarding class to a scheduler, and then apply the scheduler map to any interface that must enforce DiffServ CoS.

After they are applied to an interface, the scheduler maps affect the hardware queues, packet schedulers, and RED drop profiles.

In this example, you create the scheduler map diffserv-cos-map and apply it to the device's Ethernet interface ge-0/0/0. The map associates the mf-classifier forwarding classes to the schedulers as shown in Table 1.

Table 1: Sample diffserv-cos-map Scheduler Mapping

mf-classifier Forwarding Class

For CoS Traffic Type

diffserv-cos-map Scheduler


Best-effort traffic



Expedited forwarding traffic



Assured forwarding traffic



Network control traffic




CLI Quick Configuration

To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI at the [edit] hierarchy level, and then enter commit from the configuration mode.

Step-by-Step Procedure

The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the Junos OS CLI User Guide.

To configure and apply a scheduler map to a device’s interface:

  1. Configure a scheduler map for DiffServ CoS.

  2. Configure a best-effort forwarding class and scheduler.

  3. Configure an expedited forwarding class and scheduler.

  4. Configure an assured forwarding class and scheduler.

  5. Configure a network control class and scheduler.

  6. Apply the scheduler map to an interface.


From configuration mode, confirm your configuration by entering the show class-of-service command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.

If you are done configuring the device, enter commit from configuration mode.


Verifying the Scheduler Map Configuration


Verify that scheduler maps are configured properly.


From operational mode, enter the show class-of-service command.