HP E4223A ATM Policing & Traffic Characterization Test Application

The HP E4223A ATM Policing & Traffic Characterization Test Application provides traffic generation and analysis to verify policing algorithm implementations and test features to charaterize user traffic. A generation and analysis test methodology is used so that precisely controlled predefined traffic is generated and transmitted to the network equipment under test. The behavior of the network equipment under test is then analyzed.

The standard traffic generation capabilities of the Broadband Series Test System and enhanced by the addition of a generic cell rate algorithm (GCRA) traffic distribution.

Traffic is optimized to individually stress the cell rate or the burst size.

Traffic generated by the GCRA distribution has already been shaped. Traffic generated by other distributions - constant, burst, Poisson, etc. can be shaped to the GCRA parameters, or can deliberately violate peak cell rate, cell delay variation tolerance, sustainable cell rate, and/or maximum burst size parameters. In addition to user-defined cells and cell sequences, special usage parameter control (UPC) test cells can be used for additional in-depth testing. These test cells contain sequence numbers and the original cell loss priority (CLP) bit in order to detect cell loss and tagging.

• Generates pre-defined conforming (or non-conforming) traffic and then observes the reaction of the network equipment under test
• Uses a large sample of up to 131,072 cells to accurately characterize traffic
• Measures cell arrival time, cell interarrival time, cell delay, peak-to-peak cell delay variation, and 1-point cell delay variation
• VP/VC utilization analysis

Traffic Generation Distributions

GCRA                    
GCRA type (single or dual leaky bucket), peak cell rate (0.5 to 100% 
of line rate), cell delay variation tolerance (range depends on 
specific line interface used), sustainable cell rate (0.5 to 100% of 
line rate), maximum burst size (SCR dependent, 1 to 2047 cells 
when using an E4209A, 1 to 8183 cells when using an E4209B Cell 
Protocol Processor)

Constant                
Mean load (0.5 to 100% of line rate)

Burst                   
Burst maximum load (0 to 100% of line rate) and gap (0 to 3894 cells)

Sawtooth                
Minimum & maximum loads (0.5 to 100% of line rate), burst gap 
(0 to 3894 cells)

Poisson                 
Mean cell interarrival time


Traffic Shaping Parameters

PCR CLP=0+1              
Peak cell rate
Cell delay variation tolerance

PCR CLP=0+1, SCR CLP=0+1
Peak cell rate
Cell delay variationtolerance 
Sustainable cell rate
Maximum burst size


Measurements Available on UPC Test Cells
CLP=0 cell count
CLP=0 cell loss count
CLP=1 cell count
Cell loss count
Tagged cell count


User Traffic GCRA Conformance Analysis
GCRA Type               
Non-conforming cells

PCR CLP=0                
(count and ratio)

PCR CLP=0+1              
Conforming cell count

PCR CLP=0, PCR CLP=0+1   
Cell conformance bar graph

SCR CLP=0, PCR CLP=0+1

SCR CLP=0+1, PCR CLP=0+1

OAM end-to-end, PCR CLP=0+1

GCRA Parameters
PCR and CDVT
SCR and MBS


ATM Traffic Characterization

Cell arrival time         
Minimum & maximum
Mean & variance

Histogram

Cell interarrival time    
Minimum & maximum
Mean & variance
Histogram

Cell delay*               
Minimum & maximum
Mean & variance
Peak-to-peak CDV
Histogram

CLP count                
CLP=0 count and ratio
CLP=1 count
CLP bar graph

1=point CDV               
Minimum & maximum
Mean & variance
Histogram

*These measurements are not available when using the E4203A 155 Mb/s
 Protocol Line Interface


Applicable Standards

ATM Forum UNI 3.0 & 3.1   
GCRA definition and tagging algorithm

Draft Version 4.0 of the ATM Forum Traffic Management Specification    
(02/96)
Definition of peak-to-peak cell delay variation

ITU-T Recommendation I.371 (07/95)   
GCRA definition (including OAM end-to-end variation) and tagging 
algorithm

ITU-T Draft New Recommendation O.191 (04/95)              
Algorithm for computing cell loss and cell misinsertion implemented 
using proprietary test cells

ITU-T Draft Revised Recommendation I.356 (07/95)
Non-conforming cell algorithm (for transmitted traffic) cell delay, 
1-point CDV

HP E4223A     ATM Policing & Traffic Characterization Test Application


Requirements:

Base system requirement:
HP E4200A/B     HP Broadband Series Test System Form 7 Transportable Base
or
HP E4210A/B     HP Broadband Series Test System Form 13 Mainframe Base

HP E4223A       ATM Policing & Traffic Characterization Test Application
   Opt QA0      Scheduled software updates

HP E4209A/B     Cell Protocol Processor and a line interface module
                Version 3.02 or later of the BSTS Base System Software

If you do not have the Adobe Acrobat Reader necessary for viewing PDF documentation, download your free Acrobat Reader now.

To help you make the right product choices

Your Field Sales Engineer is ready to answer your questions about specifications, applications and ordering. Find your Field Sales Engineer at your Local Sales Office.

Related product families available online:

Broadband Series Test System
Broadband/ATM

[Hewlett-Packard] [HP Test & Measurement] [Product Information] [Model Number Index]

Privacy Statement    Use of this site indicates that you accept the Terms of Use

Contact HP Test & Measurement. (c) Copyright 1994 - 1998 Hewlett-Packard Company.

Page Updated: Friday February 12 03:00:44 UTC 1999