Figure 4: Virtual Scheduler Internal Bandwidth Allocation - Alcatel-Lucent 7950 Quality Of Service Manual

Child Offered Within CIR and Above CIR Load
Limited by Child Maximum Rate (PIR)
Child Served Within CIR Loop According to
Provisioned CIR-Level
CIR-Weight Determines Ratio of Bandwidth for
Child When Multiple Children Are Mapped to
Same Within CIR Loop
Child
Scheduler
OR
Child
Queue
Child Served By Above CIR Loop According to
Provisioned Level
Weight Determines Ratio of Bandwidth for
Child When Multiple Children Are Mapped to
Same Above CIR Loop
Legend
Prioritizing Loop (Weighted or Strict)
Maximum and Committed
Rate Parameters
Bandwidth Dependency Association
Bandwidth Allocation
.
7950 XRS Quality of Service Guide
Child Undefined CIR
Level Forces All
Offered Load For
Child to be Treated as
Above CIR Level
and Weight

Figure 4: Virtual Scheduler Internal Bandwidth Allocation

CIRL
8
CIRL
7
CIRL
6
Within
CIRL
CIR
5
StrictLoop
High
Priority
CIRL
4
CIRL
3
CIRL
2
Scheduler CIR Based on
Provisioned Value or
CIRL
1
Sum of Child CIR Values
Scheduler Rate (PIR)
L8
Based on Provisioned
Value
L7
L6
Above
L5
CIR
StrictLoop
Low
Priority
L4
L3
L2
L1
QoS Policies
Scheduler
Loop Within
Policy
Rate Limiting Strict Loop
Receives Bandwidth
According to it's Offered
Load Within CIR and
Offered Load Above CIR
Rate
Limiting
StrictLoop
Rate Limiting Strict Loop
Distributes Available
Bandwidth to Each Child
According to Child
Offered Load Within and
Offered Load Above
Child CIR
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