User Guide for FibeAir® IP-20 All-Outdoor Products, CeraOS 10.5
Page 296 of 825
Ceragon Proprietary and Confidential
7.
Quality of Service (QoS)
This section includes:
•
•
•
Configuring Policers (Rate Metering)
•
•
•
•
Note:
You can display QoS egress PMs and statistics, but only via CLI. For
information, see
Displaying Egress PMs and Statistics
7.1
QoS Overview
Quality of Service (QoS) deals with the way frames are handled within the
switching fabric. QoS is required in order to deal with many different network
scenarios, such as traffic congestion, packet availability, and delay restrictions.
IP-20
’s personalized QoS enables operators to handle a wide and diverse range of
scenarios. IP-20
’s smart QoS mechanism operates from the frame’s ingress into
the switching fabric until the moment the frame egresses via the destination port.
QoS capability is very important due to the diverse topologies that exist in today’s
network scenarios. These can include, for example, streams from two different
ports that egress via single port, or a port-to-port connection that holds hundreds
of services. In each topology, a customized approach to handling QoS will provide
the best results.
’s QoS mechanism. Traffic ingresses (left
to right) via the Ethernet or radio interfaces, on the “ingress path.” Based on the
services model, the system determines how to route the traffic. Traffic is then
dire
cted to the most appropriate output queue via the “egress path.”
(Optional)
Egress
Port
Scheduler/
Shaper
Standard QoS/ H-QoS
Queue
Manager
Marker
(Optional)
Egress
Port
Scheduler/
Shaper
Standard QoS/ H-QoS
Queue
Manager
Marker
(Optional)
Egress
Port
Scheduler/
Shaper
Standard QoS/ H-QoS
Queue
Manager
Marker
CET/Pipe
Services
Rate Limit
(Policing)
Classifier
(Optional)
Ingress
Port
Rate Limit
(Policing)
Classifier
(Optional)
Ingress
Port
Rate Limit
(Policing)
Classifier
(Optional)
Ingress
Port
GE/Radio
GE/Radio
GE/Radio
GE/Radio
GE/Radio
GE/Radio
Figure 220: QoS Block Diagram
The ingress path consists of the following QoS building blocks: