# Example: QoS Parameter Configuration for QoS Downstream Rate

This example illustrates how to use parameters to control the downstream rate obtained from ANCP.

In this example, the subscribers on the 0.1 access loop are configured on VLAN1. They subscribe to voice, video, and data traffic with a bandwidth of 10 Mbps. Subscribers on the 1.1 access loop are configured on VLAN2, and subscribe to 1 Mbps of data traffic.

Table 33 lists the shaping mode and shaping rate information received by the QoS downstream rate application upon access loop synchronization. The parameter instances are created with these values.

Table 33: Shaping Rate and Shaping Mode

| VLAN1 | VLAN2
--- | --- | ---
Shaping mode | Cell | Cell
Shaping rate | 10000000 bps | 100000 bps

Configuring Traffic Classes

The QoS administrator configures the traffic classes for voice and video services.

1. Configure the traffic class named voice.
   host1(config)#traffic-class voice host1(config-traffic-class)#exit
2. Configure the traffic class named video.
   host1(config)#traffic-class video host1(config-traffic-class)#exit

Configuring the QoS Parameter Definition for QoS Downstream Rate

The QoS administrator configures a parameter definition for the QoS downstream rate application. Using subscriber-interface types, the QoS administrator then enables ANCP to create parameter instances of the QoS downstream rate application.

1. Configure a parameter definition named ancpVlan.
   host1(config)#qos-parameter-define ancpVlan application qos-downstream-rate
2. Define the controlled-interface types for vlan and ip to adjust the shaping rate for the VLAN and IP queues.
   1. Configure the controlled-interface type for VLAN.
   2. Configure the controlled-interface type for IP.
      host1(config-qos-parameter-define)#controlled-interface-type vlan host1(config-qos-parameter-define)#controlled-interface-type ip
3. Define the subscriber-interface types for vlan and ethernet.
   host1(config-qos-parameter-define)#subscriber-interface-type vlan host1(config-qos-parameter-define)#subscriber-interface-type ethernet host1(config-qos-parameter-define)#exit

Configuring the QoS Parameter Definition for QoS Cell Mode

The QoS administrator then configures the QoS shaping mode using the QoS cell mode application. Using subscriber-interface types, the QoS administrator then enables ANCP to create parameter instances using the QoS cell mode application.

1. Configure a parameter definition named cellmodeVlan.
   host1(config)#qos-parameter-define cellmodeVlan application qos-cell-mode
2. Define the controlled-interface types for vlan and ip for the shaping mode.
   host1(config-qos-parameter-define)#controlled-interface-type vlan host1(config-qos-parameter-define)#controlled-interface-type ip host1(config-qos-parameter-define)#exit
3. Define the subscriber-interface types for vlan and ethernet.
   host1(config-qos-parameter-define)#subscriber-interface-type vlan host1(config-qos-parameter-define)#subscriber-interface-type ethernet host1(config-qos-parameter-define)#exit

Enabling QoS Adaptive Mode

The QoS administrator enables QoS adaptive mode for ANCP.

1. Enter Layer 2 Control Configuration mode.
   host1(config)#l2c
2. Enable QoS adaptive mode for the system.
   host1(config-l2c)#qos-adaptive-mode

Reference the Parameter Definition Within a Scheduler Profile

The QoS administrator configures the shaping rate and the shared-shaping rate within scheduler profiles for the VLAN1 and VLAN2 subscribers.

1. Configure the scheduler profile for the subscriber vlan1.
   1. Configure the scheduler profile named vlan1.
   2. Configure the shared-shaping rate by referencing the ancpVlan parameter with a burst of 10 milliseconds.
      host1(config)#scheduler-profile vlan1 host1(config-scheduler-profile)#shared-shaping-rate ancpVlan burst 10 milliseconds auto host1(config-scheduler-profile)#exit
2. Configure the scheduler profile for the voice service.
   1. Configure the scheduler profile named voice.
   2. Configure the shaping rate of 100000 with a burst of 10 milliseconds.
      host1(config)#scheduler-profile voice host1(config-scheduler-profile)#shaping-rate 100000 burst 10 milliseconds host1(config-scheduler-profile)#exit
3. Configure the scheduler profile for the video service.
   1. Configure the scheduler profile named video.
   2. Configure the shaping rate of 8000000 with a burst of 10 milliseconds.
      host1(config)#scheduler-profile video host1(config-scheduler-profile)#shaping-rate 8000000 burst 10 milliseconds host1(config-scheduler-profile)#exit
4. Configure the scheduler profile for the subscriber vlan2.
   1. Configure the scheduler profile named vlan2.
   2. Configure the shaping rate by referencing the ancpVlan parameter with a burst of 10 milliseconds.
      host1(config)#scheduler-profile vlan2 host1(config-scheduler-profile)#shaping-rate ancpVlan burst 10 milliseconds host1(config-scheduler-profile)#exit

Adding the Scheduler Profiles to a QoS Profile

After configuring the scheduler profiles, the QoS administrator then configures QoS profiles for the VLAN1 and VLAN2 subscribers.

1. Configure the vlan1 QoS profile with a shared-shaping rate that matches the downstream rate.
   1. Configure the QoS profile named vlan1.
   2. Configure the vlan node and reference the scheduler profile vlan1.
   3. Configure the vlan queue and reference the voice traffic class and the voice scheduler profile.
   4. Configure the vlan queue and reference the video traffic class and the video scheduler profile.
      host1(config)#qos-profile vlan1 host1(config-qos-profile)#vlan node scheduler-profile vlan1 host1(config-qos-profile)#vlan queue traffic-class voice scheduler-profile voice host1(config-qos-profile)#vlan queue traffic-class video scheduler-profile video host1(config-qos-profile)#exit
2. Configure the vlan2 QoS profile with a shaping rate of 1 Mbps.
   1. Configure the QoS profile named vlan2.
   2. Configure the vlan node and reference the scheduler profile vlan2.
      host1(config)#qos-profile vlan2 host1(config-qos-profile)#vlan node scheduler-profile vlan2 host1(config-qos-profile)#exit

Attaching the QoS Profile to an Interface

The QoS administrator creates logical interfaces for VLAN1 and VLAN2 and attaches the QoS profiles to them. As the subscribers log in, ANCP creates the parameter instances for cellmodeVlan and ancpVlan using RADIUS VSAs.

1. Attach the vlan1 QoS profile to VLAN1.
   1. Configure the Gigabit Ethernet interface in slot 6, adapter 0, port 0.
   2. Configure the VLAN major interface.
   3. Configure the Gigabit Ethernet interface in slot 6, adapter 0, port 0, subinterface 1.
   4. Assign VLAN ID of 1.
   5. Attach the QoS profile vc1 to the interface.
      host1(config)#interface gigabitEthernet 6/0/0 host1(config-if)#encapsulation vlan host1(config-if)#interface gigabitEthernet 6/0/0.1 host1(config-if)#vlan id 1 host1(config-if)#qos-profile vlan1 host1(config-if)#exit
2. Attach the vlan2 QoS profile to VLAN2.
   1. Specify the Gigabit Ethernet interface in slot 6, adapter 0, port 1.
   2. Assign a VLAN ID of 2.
   3. Attach the QoS profile vlan2 to the interface.
      host1(config-if)#interface gigabitEthernet 6/0/1.1 host1(config-if)#vlan id 2 host1(config-if)#qos-profile vlan2 host1(config-if)#exit

## Complete Configuration Example

You can use the complete configuration examples provided for each of the configurations in your own network. To customize the configuration example for your needs, copy the text into a text editor, and modify it.

To use the example for immediate use, copy it to the local console or Telnet session from which you access the router.

You can also save the example as a script (.scr) file that executes the commands as though they were entered at the terminal. For information about executing .scr files, see JunosE System Basics Configuration Guide.

From Global Configuration mode:

! Configure the traffic-classes for video and voice. traffic-class voice exit traffic-class video exit ! Create the ancpVlan QoS parameter definition. qos-parameter-define ancpVlan application qos-downstream-rate controlled-interface-type vlan controlled-interface-type ip instance-interface-type vlan instance-interface-type ethernet exit ! Create the cellmodeVlan QoS parameter definition. qos-parameter-define cellmodeVlan application qos-cell-mode controlled-interface-type vlan controlled-interface-type ip instance-interface-type vlan instance-interface-type ethernet exit ! Enable QoS adaptive mode for ANCP. l2c qos-adaptive-mode exit ! Configure the vlan1 and vlan2 scheduler profiles. scheduler-profile vlan1 shared-shaping-rate ancpVlan burst 10 milliseconds auto exit scheduler-profile voice shaping-rate 100000 burst 10 milliseconds exit scheduler-profile video shaping-rate 8000000 burst 10 milliseconds exit scheduler-profile vlan2 shaping-rate ancpVlan burst 10 milliseconds exit ! Add the scheduler profiles to the vlan1 and vlan2 QoS profiles. qos-profile vlan1 vlan node scheduler-profile vlan1 vlan queue traffic-class voice scheduler-profile voice vlan queue traffic-class video scheduler-profile video exit qos-profile vlan2 vlan node scheduler-profile vlan2 exit ! Configure the QoS downstream rate adjustment for VLAN1 and VLAN2. interface gigabitEthernet 6/0/0 encapsulation vlan interface gigabitEthernet 6/0/1.1 vlan id 1 qos-profile vlan1 exit interface gigabitEthernet 6/0/1.1 vlan id 2 qos-profile vlan2 exit

#### Related Documentation

- QoS Downstream Rate Application Overview