Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual page 127

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The range for the shared-shaping rate is 1000–1000000000 bps (1 Kbps–1000 Kbps);
the default is no shaping rate.
Use the operator and operandValue variables to specify the shared shaping rate as an
expression.
Burst is the catch-up number associated with the shaper; the range is 0–522240
(0–510 KB). Specifying 0 enables the router to select an applicable default value.
By default, shared shaping is set to auto, where the router selects the type of shared
shaping that is configured, depending on the line module. You must specify the
compound keyword to actively shape voice and video traffic so that the shared rate
cannot be exceeded, and shape data queue rates to the value of the shared rate minus
the combined voice and video traffic rate. An error message is generated if you specify
compound for line modules that do not support it, and the router applies simple
shared shaping.
Configure the QoS profile and reference the scheduler profile.
3.
(config)#qos-profile compound
(config-qos-profile)#atm-vc node
(config-qos-profile)#atm-vc node group AF
(config-qos-profile)#atm-vc node group EF
(config-qos-profile)#atm-vc queue traffic-class best-effort scheduler-profile
shared-1mbps
(config-qos-profile)#exit
TIP: The scheduler profile that you configured with the shared-shaping
rate must be referenced in the best-effort queue or the best-effort
scheduler node.
Attach the profile to the interface.
4.
(config)#interface atm 11/0.10
(config-subif)#qos-profile subscriber-default-mode
(config-scheduler-profile)#exit
Compound Shared Shaping Overview on page 95
Guidelines for Configuring Simple and Compound Shared Shaping on page 70
For more information about specifying an expression that you can reference within a
scheduler profile, see Using Expressions for Bandwidth and Burst Values in a Scheduler
Profile on page 48
Example: Compound Shared Shaping for ATM VCs on page 98
Constituent Selection for Shared Shaping Overview on page 103
node
qos-profile
queue
scheduler-profile
Chapter 12: Configuring Compound Shared Shaping of Traffic
97