Transcript
Xgig® 8.5G Fibre Channel BERT Verifying data integrity is key to ensuring the performance and reliability of high data rate networks such as 8.5 Gb/s Fibre Channel where physical signal quality is crucial to the success of data communications. The Xgig® Bit Error Rate Tester (BERT) greatly reduces manufacturing test time for hubs, host bus adapters, Fibre Channel RAIDs, and other active or passive devices by stressing all components in the data path. It verifies data integrity using industry-standard worst-case bit patterns which are specifically designed to stress the physical layer of the system, checking frequency response and data dependencies. Unique data patterns can be created to meet
Key Features yy Supports Line Rates of up to 8.5 Gb/s yy Sends, Receives, and Compares Data Bitby-Bit to Calculate BER yy Proves Data Integrity Using Industry Standard Patterns yy Provides Flexibility for Creating UserDefined Patterns and Illegal Data yy Optional Protocol-Aware Bit Error Rate Testing
special test requirements, eliminating tedious hours of testing looking for a data dependent
Benefits
error which occurs only rarely in a normal traffic stream.
yy Buffered Traffic Capture with Measurement Log
As the Xgig® BERT is “protocol aware”, it recognizes data modifications allowed by devices on the link, such as add/drop, and does not complicate testing by reporting them as errors. With
yy Capable of Triggered BER Test
bit-by-bit comparison, any difference between transmitted and received data is detected,
yy Provides Latency Measurements
counted, and captured for additional analysis and presenting results in an industry-accepted
yy Verifies Data Across Re-timers, Multiplexers, and Repeaters
format. The Xgig® 8.5 Gb/s FC BERT is based upon the Viavi Solutions industry-leading Xgig® test platform, a versatile and comprehensive solution for generating, testing, and analyzing live traffic across all major high-speed storage protocols. The Xgig® chassis hosts up to
yy Easy Scripting Support for Automated Testing yy User-friendly GUI
four blades capable of testing and analyzing different protocols such as Fibre Channel, SAS/SATA, GigE, and iSCSI. Xgig® is the only solution in the market that supports multiple protocols, multiple applications (data analysis, generation, and testing), and multiple data rates simultaneously on a single platform, providing unparalleled flexibility while maximizing customer return on investment.
Data Sheet
Frame Generations 8.5 Gb/s FC BERT supports pseudorandom protocol-based data patterns
u, including:
yy FC CJTPAT, CSPAT, CRPAT
Xgig BERT Send/compare mode
Xgig BERT Send/compare mode
System Under Test
System Under Test
yy User-Defined custom frames of any size yy The Ordered Set Library
Each pre-defined pattern can be edited at the bit level and completely customized.
Loop back
For protocol-based comparisons, only data in the compare zone
v is checked for errors. Enabling add/drop re-synchronization
Loop back Figure 2b
Figure 2a
allows pattern re-timing so the tester can still perform a precise bit
w as x. The pattern element library
comparison. Developers can define the hardware Sync Word well as the re-synchronization pattern
y is conveniently available for setting up customized patterns.
There are three operation modes for testing. Send and Compare mode, the default setting, is used when the device under test provides a loop connection (Figure 2a) such that the bits transmitted return to the Xgig® BERT for comparison or when monitoring two ports
XGIG-BERT In Send Only Mode
XGIG-BERT In Compare Only Mode
XGIG-BERT
SYSTEM UNDER TEST
In Compare Only Mode
XGIG-BERT
SYSTEM UNDER TEST
In Send Only Mode
Figure 3
transmitting to each other in full duplex mode (Figure 2b). Send Only and Compare Only modes are used for testing configurations as shown in Figure 3 where one BERT sends frames to the system under test and the other receives and counts them.
Figure 1. Generate frames
2 Xgig 8.5G Fibre Channel BERT
Data Rate
Error Injection
The Xgig® supports Fibre Channel data rates of 1.0625 Gb/s, 2.125 Gb/s,
Developers can manually inject single-bit errors into the outgoing
4.25 Gb/s and 8.5 Gb/s.
traffic simply by clicking the “injection” button
Statistics Interface
Latency Measurements
The Xgig® 8.5 Gb/s FC BERT provides extensive and continuously
The Xgig® 8.5 Gb/s FC BERT also provides latency measurements
updated statistics
{
calculated by sending out frames and measuring their return time to
based on transmitted and received data,
including clock rate, elapsed time, calculated BER, sent frames stats, received frames stats, and compared frames stats. Port status
|
}.
is
always displayed on the screen, and the tester has LED indicators for
the BERT. The frame pattern is specially defined to contain dynamic time information and can be used to measure important system characteristics including link length and delay in FC devices.
signal, loss of sync. (LOS), and mismatches. The statistics display is highly flexible and can be customized to a developer’s preferences.
Frunner and Automation Test
Buffered Traffic Capture
For automated testing, Frunner allows users to control Xgig® through
Unlike other BERT equipment, Xgig® BERT has a built-in built-in traffic
and controls, and can be called from C/C++, Perl, and Python
capture buffer for capturing data traffic for additional analysis.
environments. Contact sales for further information on FRunner.
scripts. Frunner supports any combination of customized triggers
Triggered Tests The Xgig® 8.5 Gb/s FC BERT is capable of automatically starting/ stopping tests based on a domain trigger. Several predefined trigger conditions can be defined in the pattern configuration
z.
Figure 4. Pattern Statistics Diagrams
3 Xgig 8.5G Fibre Channel BERT
Applications The Xgig® BERT is an excellent tool for verifying system data integrity during the installation of a DWDM or CWDM ring. Afterwards, field engineers can use it as part of a preventative maintenance program by connecting the Xgig® BERT to a Fibre Channel port and setting the ring to loopback data, if possible. To perform “head-to-head” ring testing, a second Xgig® BERT can be connected at another node on the ring. For errors detected at the system level, the Xgig® BERT can test individual cables and components to isolate the failing device. Using the multi-protocol Xgig® Analyzer for Fibre Channel with the Xgig® BERT or standalone provides powerful troubleshooting and verification capabilities. The Xgig® BERT can also test the physical layer, re-timing, and bypass circuitry in Fibre Channel devices. Devices can be exercised by generating data at the maximum rate, and the physical layer can be stressed to check for pattern and noise sensitivities. Data re-timers can be tested for bit sensitivity, and power supply and distribution can be checked with patterns that toggle bits on the link and in memory at the maximum rate. The Xgig® BERT can also verify error detection and/or error correction with circuitry the use of custom patterns. The Xgig® 8.5 Gb/s FC BERT client software runs under the Viavi Maestro software suite. Maestro also serves as the host for Xgig® FC and SAS/SATA Jammer products.
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+1 844 GO VIAVI (+1 844 468 4284)
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© 2015 Viavi Solutions, Inc. Product specifications and descriptions in this document are subject to change without notice. xgigfcbert-ds-san-tm-ae 30162794 900 0809
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