Vp Shaping; Integrating The Hrr Scheduler And Sar Scheduler; Figure 43: Integrated Atm Scheduler - Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010 Configuration Manual

VC backpressure affects only VC nodes that are in the default traffic-class group. As
a consequence, VC nodes that are in named traffic-class groups within the scheduler
hierarchy are not affected by VC backpressure.

Figure 43: Integrated ATM Scheduler

VP Shaping

VP shaping can be performed either in the SAR or by using the QoS shaping
application using QoS profiles. Configuring VP shaping in the SAR enables traffic to
be sent out of the port at a rate that closely matches strict ATM contract rates. SAR
VP shaping is configured for the physical port using the atm vp-tunnel command.
Related Topics

Integrating the HRR Scheduler and SAR Scheduler

The proper integration of the two schedulers is an important element of the router's
ATM QoS support. Three QoS port modes control integration of the two schedulers:
Chapter 19: Configuring an Integrated Scheduler to Provide QoS for ATM
Integrating the HRR Scheduler and SAR Scheduler on page 161
Per-Packet Queuing on the SAR Scheduler Overview on page 163
Integrating the HRR Scheduler and SAR Scheduler
161