Configuring User-Defined CoS Variables in a Dynamic Service Profile

You can configure user-defined variables in the dynamic service profile for traffic scheduling and shaping parameters.

Note: The JUNOS predefined variables for dynamic CoS are only to be used in dynamic access profiles and not in dynamic service profiles.

You can use variables in a dynamic service profile in two ways:

• To enable subscribers to upgrade or downgrade services after login using a RADIUS change of authorization (CoA), configure user-defined variables for CoS parameters as RADIUS attributes.
• To provide subscribers with default values for CoS parameters, configure user-defined variables for CoS parameters with static default values. If you have configured values to be supplied by a RADIUS CoA, subscribers can receive the previously configured default value when deactivating a service.

You activate the variables by referencing them in the traffic control profile configured in the dynamic service profile.

To configure user-defined variables for CoS in a dynamic profile:

1. Specify that you want to configure variables in the dynamic profile.

   [edit dynamic-profiles residential-silver variables]

2. Do one of the following to configure variables for the shaping rate:
   • Enable RADIUS to modify the shaping rate based on service changes.
     1. Configure the attribute:

        [edit dynamic-profiles residential-silver variables]

        user@host# set srate radius vendor-id 4874 attribute 108

     2. Configure the tag:

        [edit dynamic-profiles residential-silver variables]

        user@host# set srate radius vendor-id 4874 tag 2

     Note: You can configure user-defined values for RADIUS tags that are different than the values that are required in access profiles with predefined variables. For example, in a dynamic service profile, you could assign the shaping rate with a tag of 1 rather than 2, which is required for the $junos-shaping-rate variable. When you configure user-defined values, the VSA that is sent from RADIUS must share the same definition.

   • Configure a default value for the shaping rate.

     [edit dynamic-profiles residential-silver variables]

     user@host# set srate default-value 10m

3. Do one of the following to configure variables for the guaranteed rate.
   • Enable RADIUS to modify the guaranteed rate based on service changes.
     1. Configure the attribute:

        [edit dynamic-profiles residential-silver variables]

        user@host# set grate radius vendor-id 4874 attribute 108

     2. Configure the tag:

        [edit dynamic-profiles residential-silver variables]

        user@host# set grate radius vendor-id 4874 tag 3

   • Configure a default value for the guaranteed rate.

     [edit dynamic-profiles residential-silver variables]

     user@host# set grate default-value 5m

4. Do one of the following to configure variables for the delay buffer rate:
   • Enable RADIUS to modify the delay buffer rate based on service changes.
     1. Configure the attribute:

        [edit dynamic-profiles residential-silver variables]

        user@host# set dbrate radius vendor-id 4874 attribute 108

     2. Configure the tag:

        [edit dynamic-profiles residential-silver variables]

        user@host# set dbrate radius vendor-id 4874 tag 4

   • Configure a default value for the delay buffer rate.

     [edit dynamic-profiles residential-silver variables]

     user@host# set dbrate default-value 10m

5. Do one of the following to configure variables for the scheduler map.
   • Enable RADIUS to modify the scheduler map based on service changes.
     1. Configure the attribute:

        [edit dynamic-profiles residential-silver variables]

        user@host# set smap radius vendor-id 4874 attribute 108

     2. Configure the tag:

        [edit dynamic-profiles residential-silver variables]

        user@host# set smap radius vendor-id 4874 tag 1

   • Configure a default value for the scheduler map.

     [edit dynamic-profiles residential-silver variables]

     user@host# set smap default-value triple-play

6. Configure the variables for the CoS parameters in the traffic control profile.

   Either the shaping rate or the guaranteed rate are required in the traffic control profile.

   1. Specify that you want to configure CoS parameters in the dynamic profile.

      user@host# edit dynamic-profiles residential-silver class-of-service traffic-control-profiles tcp1

   2. Configure the scheduler map variable.

      [edit dynamic-profiles residential-silver class-of-service traffic-control-profiles tcp1]

      user@host# set scheduler-map "$smap"

   3. Configure the shaping rate variable.

      [edit dynamic-profiles residential-silver class-of-service traffic-control-profiles tcp1]

      user@host# set shaping-rate "$srate"

   4. Configure the guaranteed rate variable.

      [edit dynamic-profiles residential-silver class-of-service traffic-control-profiles tcp1]

      user@host# set guaranteed-rate "$grate"

   5. Configure the delay buffer rate variable.

      [edit dynamic-profiles residential-silver class-of-service traffic-control-profiles tcp1]

      user@host# set delay-buffer-rate "$dbrate"

Related Topics

• Changing CoS Services Overview
• Guidelines for Configuring CoS for Subscriber Access