Implicit Bandwidth Allocation For Compound Shared Shaping; Figure 30: Implicit Constituent Selection For Compound Shared Shaper At - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

Figure 30: Implicit Constituent Selection for Compound Shared Shaper at Best-Effort Queue

Implicit Bandwidth Allocation for Compound Shared Shaping

Copyright © 2010, Juniper Networks, Inc.
Chapter 13: Configuring Implicit and Explicit Constituent Selection for Shaping
Figure 30 on page 107 illustrates other examples of implicit constituent selection. It does
not reflect typical configurations, but includes a mixture of interface types: IP, VC, and
VP. If only scheduler profile A is applied, the associated interface is VC 1. The selected
constituents then consist of the VC 1 best-effort node, the VC 1 TC voice queue, and the
VC 1 TC video queue.
If only scheduler profile B is applied, the associated interface is IP 1. The selected
constituents then consist of the IP 1 best-effort queue, the IP 1 TC voice queue, and the
IP 1 TC video queue.
If only scheduler profile C is applied, the associated interface is VP 1. The selected
constituents then consist of the VP 1 default group node, the VP 1 Group EF node, and
the VP 1 Group AF node.
After selecting the implicit constituents for compound shared shaping, the router places
the constituents in an order that determines how the constituents can claim a share of
the available shared bandwidth.
When it implements compound implicit shared shapers, the software selects attributes
for the active constituents consistent with the hierarchical scheduler.
Auto-strict nodes and queues have the highest priority.
Nodes and queues in extended traffic-class groups are next.
Nodes and queues in the default traffic-class group have the lowest priority.
For example, suppose a compound shared shaper has a rate of 2 Mbps. The shared
shaper has three active constituents: the best-effort node, a voice queue in the auto-strict
traffic-class group, and a video queue in an extended traffic-class group. For compound
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