9.2.2 Global Results (Multiple Streams)
The Global results pages displays measurements for all traffic streams as well as non test traffic. Aggregate screen displays
transmitted and received:
Line Rate
(Mbps): Negotiated rate of the interface (10M, 100M, or 1000M). This value is always fixed since it depends on
the maximum capacity of the link under test, hence the test interface that is configured.
Framed Rate:
(P MAC/IP VLAN Tag + Type/ CRC) / (P Total Overhead) * Line Rate %
(in Mbps).
Data Rate:
Payload / (P Total Overhead) * Line Rate %.
Utilization:
% of Line Rate. For example, if we transmit 100Mbps on a 1Gbps interface then the utilization value is 10% (or
100Mbps) of the total link capacity (or Line Rate).
Total # of frames.
Total number of bad frames.
Optical power:
Optical level measured by the SFP or XFP transceiver.
The Global Stream Summary screen displays:
Stream number (#)
Total received bandwidth per stream
Errors/alarms associated with the stream
Quality of Service (QoS) performance verification associated with each stream
QoS
QoS values are based on packet statistic thresholds for roundtrip delay, jitter, frame loss, and IP checksum from the ITU-T Y.1541
standard. Below is a list of IP network QoS class definitions and network performance objectives from Y.1541.
IP Network QoS Class Definitions and Network Performance Objectives
(Classes 0-3)
IP Network QoS Class Definitions and Network Performance Objectives
(Classes 4-7)
/ e_Manual D07-00-050P RevD00
Page 62 of 115
