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Chapter 19: Quality of Service (QoS) (CLI)
Configuring Scheduling (CLI)
phn-3965_006v002
Page 19-40
Configuring Scheduling (CLI)
This section includes:
•
Overview of Egress Scheduling (CLI)
•
Configuring Queue Priority (CLI)
•
Configuring Interface Priority Profiles (CLI)
•
Attaching a Priority Profile to an Interface (CLI)
•
Configuring Weighted Fair Queuing (WFQ) (CLI)
Overview of Egress Scheduling (CLI)
Egress scheduling is responsible for transmission from the priority queues. PTP 820G and PTP 820F use a unique
algorithm with a hierarchical scheduling model over the three levels of the egress path that enables compliance
with SLA requirements.
The scheduler scans all the queues over all the service bundles, per interface, and determines which queue is ready
to transmit. If more than one queue is ready to transmit, the scheduler determines which queue transmits first
based on:
•
Queue Priority
–
A queue with higher priority is served before lower-priority queues.
•
Weighted Fair Queuing (WFQ)
–
If two or more queues have the same priority and are ready to transmit, the
scheduler transmits frames from the queues based on a WFQ algorithm that determines the ratio of frames
per queue based on a predefined weight assigned to each queue.
Configuring Queue Priority (CLI)
A priority profile defines the exact order for serving the eight priority queues in a single service bundle. When you
attach a priority profile to an interface, all the service bundles under the interface inherit the profile.
The priority mechanism distinguishes between two states of the service bundle:
•
Green State
–
Committed state
•
Yellow state
–
Best effort state
Green State refers to any time when the service bundle rate is below the user-defined CIR. Yellow State refers to
any time when the service bundle is above the user-defined CIR but below the PIR.
You can define up to four Green priority profiles, from 4 (highest) to 1 (lowest). An additional four Yellow priority
profiles are defined automatically and cannot be changed or edited.
The following table provides a sample of an interface priority profile. This profile is also used as the default
interface priority profile.
Table 246
Interface Priority Profile Example
Содержание PTP 820 Series
Страница 1: ...User Guide ...
Страница 49: ...Chapter 1 Introduction Configuration Tips phn 3965_006v002 Page 1 3 ...
Страница 57: ...Chapter 1 Introduction Front Panel Description phn 3965_006v002 Page 1 11 Figure 5 SM Card and Cover ...
Страница 114: ...Chapter 2 Getting Started Changing the Management IP Address phn 3965_006v002 Page 2 19 10 Click Apply ...
Страница 162: ...Chapter 3 Configuration Guide System Configurations phn 3965_006v002 Page 3 4 ...
Страница 294: ...Chapter 4 Unit Management Upgrading the Software phn 3965_006v002 Page 4 19 5 Select FTP ...
Страница 357: ...Chapter 5 Radio Configuration Configuring and Viewing Radio PMs and Statistics phn 3965_006v002 Page 5 43 ...
Страница 371: ...Chapter 5 Radio Configuration Configuring and Viewing Radio PMs and Statistics phn 3965_006v002 Page 5 57 ...
Страница 678: ...Chapter 12 Alarm Management and Troubleshooting Performing Diagnostics phn 3965_006v002 Page 12 28 ...
Страница 713: ...Chapter 14 Getting Started CLI Configuring the Activation Key CLI phn 3965_006v002 Page 14 18 ...
Страница 731: ...Chapter 14 Getting Started CLI Operating in FIPS Mode CLI phn 3965_006v002 Page 14 36 ...
Страница 809: ...Chapter 17 Radio Configuration CLI Configuring and Viewing Radio PMs and Statistics CLI phn 3965_006v002 Page 17 20 ...
Страница 867: ...Chapter 18 Ethernet Services and Interfaces CLI Viewing Ethernet PMs and Statistics CLI phn 3965_006v002 Page 18 48 ...
Страница 1002: ...Chapter 22 Synchronization CLI Configuring 1588 Transparent Clock CLI phn 3965_006v002 Page 22 15 ...
Страница 1149: ...phn 3965_006v002 Page V Term Definition WRED Weighted Random Early Detection XPIC Cross Polarization Interference Cancellation ...