FibeAir IP-20C/S/E
User Guide
Ceragon Proprietary and Confidential
Page 196 of 597
7.
Quality of Service (QoS)
This section includes:
Configuring Policers (Rate Metering)
Note:
You can display QoS egress statistics, but only via CLI. For
information, see Displaying Egress Statistics (CLI).
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.
Figure 139 shows the basic flow of IP-20’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 directed to the most appropriate output queue via the “egress path.”
