Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010, Configuration Manual

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We recommend that you apply the byte adjustment parameter at the lowest
interface column so that upper interfaces automatically have the parameter.
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On the ES2 10G LM, the shaping rate adjustment is performed more efficiently
by the TFA ASIC than ASICS on other modules. The TFA ASIC performs an internal
adjustment of 4 bytes. The maximum byte adjustment value that you can
configure is 59. When you configure a byte adjustment value greater than 59 in
a QoS parameter, the system automatically resets the value to 59.
Related Topics
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Byte Adjustment for ADSL and VDSL Traffic Overview on page 293
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Configuring a Parameter Definition to Adjust Cell Shaping Rates for ADSL Traffic
on page 297
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Configuring a Parameter Definition to Adjust Frame Shaping Rates for VDSL
Traffic on page 299
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Example: QoS Parameter Configuration for QoS Cell Mode and Byte Adjustment
for Cell Shaping on page 286
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For more information about configuring shaping modes for Ethernet, see QoS
Shaping Mode for Ethernet Interfaces Overview on page 178 and Cell Shaping
Mode Using QoS Parameters Overview on page 281
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.
a. Configure the QoS parameter name and the application.
host1(config)# qos-parameter-define byteadjust1 application
qos-byte-adjustment
b. Configure a controlled-interface type.
Configuring a Parameter Definition to Adjust Cell Shaping Rates for ADSL Traffic
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Chapter 29: Configuring Byte Adjustment for Shaping Rates with QoS Parameters