User Guide for FibeAir® IP-20 All-Outdoor Products, CeraOS 10.5
Page 297 of 825
Ceragon Proprietary and Confidential
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Ingress Classifier
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A hierarchical mechanism that deals with ingress traffic on
three different levels: interface, service point, and service. The classifier
determines the exact traffic stream and associates it with the appropriate
service. It also calculates an ingress frame CoS and Color. CoS and Color
classification can be performed on three levels, according to the user’s
configuration.
•
Ingress Rate Metering
–
A hierarchical mechanism that deals with ingress
traffic on three different levels: interface, service point, and service point CoS.
The rate metering mechanism enables the system to measure the incoming
frame rate on different levels using a TrTCM standard MEF rate meter, and to
determine whether to modify the color calculated during the classification
stage.
The egress path consists of the following QoS building blocks:
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Queue Manager
–
This is the mechanism responsible for managing the
transmission queues, utilizing smart WRED per queue and per packet color
(Green or Yellow).
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Scheduling and Shaping
–
A hierarchical mechanism that is responsible for
scheduling the transmission of frames from the transmission queues, based
on priority among queues, Weighted Fair Queuing (WFQ) in bytes per each
transmission queue, and eligibility to transmit based on required shaping on
several different levels (per queue, per service bundle, and per port).
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Marker
–
This mechanism provides the ability to modify priority bits in frames
based on the calculated CoS and Color.
For a more detailed description of QoS in the IP-20, refer to the Technical
Description for the IP-20 product type you are using.
