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# Configuring a Parameter Definition to Adjust Cell Shaping Rates for ADSL Traffic

You can adjust shaping rates to account for different layer 2 encapsulations as well as the ATM cell pad, header, and trailer on interfaces with cell shaping mode using the qos-byte-adjustment application.

| Note: When you apply a parameter with the qos-byte-adjustment application to an interface with frame shaping mode, you adjust shaping rates to account for different layer 2 encapsulations only.

To associate a parameter instance with the byte adjustment application:

1. Configure the traffic classes.
   `
   host1(config)#traffic-class voice
   host1(config-traffic-class)#exit
   host1(config)#traffic-class best-effort
   host1(config-traffic-class)#exit
   `
2. Create a parameter definition.
   1. Configure the QoS parameter name and the application.
      `
      host1(config)#qos-parameter-define byteadjust1 application qos-byte-adjustment
      `
   2. Configure a controlled-interface type.
      `
      host1(config-qos-parameter-define)#controlled-interface-type vlan
      host1(config-qos-parameter-define)#controlled-interface-type ip
      `
   3. Configure an instance-interface type.
      `
      host1(config-qos-parameter-define)#instance-interface-type vlan
      `
3. Do one of the following:
   - Configure the shaping mode by issuing the qos-shaping-mode command.

     Frame shaping mode is the default for Ethernet interfaces on all E-series routers. You can only set the cell shaping mode for Gigabit Ethernet and 10-Gigabit Ethernet interfaces configured on the GE-2 line module, the GE-HDE line module, and the ES2 4G LM.

   - Configure the shaping mode by specifying the QoS cell mode application with a parameter definition.
     `
     host1(config)#qos-parameter-define cell-mode application qos-cell-mode
     `
4. Attach the parameter definition to a logical Ethernet interface.

   In this example, parameter instances are created for both the byte adjustment and QoS cell mode applications.

   `
   host1(config)#interface gigabitEthernet 7/0
   host1(config-if)#encapsulation vlan
   host1(config-if)#exit
   host1(config)#interface gigabitEthernet 7/0.1
   host1(config-if)#vlan id 1
   host1(config-if)#qos-parameter byteadjustment -16
   host1(config-if)#qos-parameter cell-mode 1
   host1(config-if)#ip address 1.1.1.1 255.255.255.0
   `

#### Related Topics

- Byte Adjustment for ADSL and VDSL Traffic Overview
- Guidelines for Configuring Byte Adjustment of Cell and Frame Shaping Rates Using QoS Parameters
- Example: QoS Parameter Configuration for QoS Cell Mode and Byte Adjustment for Cell Shaping
- For information about managing packet fragmentation for traffic with frame shaping mode, see Configuring a Parameter Definition to Adjust Frame Shaping Rates for VDSL Traffic
- For more information about configuring shaping modes for Ethernet, see QoS Shaping Mode for Ethernet Interfaces Overview and Cell Shaping Mode Using QoS Parameters Overview
- controlled-interface-type command
- encapsulation vlan command
- instance-interface-type command
- ip address command
- node command
- qos-parameter command
- qos-parameter-define command
- qos-profile command
- queue command
- traffic-class command
- vlan id command

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