Scrambling - Viavi Xgig User Manual

Chapter 4, Xgig TraceControl Capture Configuration
Once you have set the
individual port-pairs by selecting them and setting the value of
maximum Trace Size is 500MB for all non-multiplexed ports in the domain based on the Number
of Segments set to 4, you can select a port-pair within the domain and set the Trace Size to
100MB.
Number of Segments
The number of segments can be set from 1 to 128. If the number of segments is set to one, a single
capture buffer is used that includes all available memory. To set number of segments, follow these
steps:
1 Place the cursor in the
2 Use the arrow keys to select the number of segments, or enter a value in the
Segments
All ports within a domain will have the same number of segments.
Trace Size
A trace size can be set from 2MB to the maximum memory available for the segment. To set the
trace size, follow these steps:
Place the cursor in the
1
Use the arrow keys to select a trace size, or enter a value in the
2
You can have different trace sizes for different ports that are part of the same domain.

Scrambling

This setting applies only to the 8G Fibre Channel ports and PCIe ports. It allows you to specify
whether the capture will include scrambled data. For Fibre Channel, select the ports, and check the
Scrambling
Lane Control
When capturing data using analyzer ports on the new 8G Fibre Channel blade, you can set the link
speed so that the capture will include or not include scrambled data. By default, scrambled data is
turned on for 8.5000 Gbps captures and turned off for lower-speed captures. You must set the
to 8.5000 (Scrambling Off) to turn off the data scrambling feature for 8.5000 Gbps link
Speed
speed. You must set the
scrambling feature for 2.1250 Gbps link speed.
When capturing data using analyzer ports on the Xgig1000 with 16G FC functionality, you can set
the link speed so that the capture will include or not include scrambled data. By default, scrambled
data is turned on for 8.2500 Gbps captures and turned off for 4.2500 Gbps captures.
If you toggle between the scrambling and the non-scrambling mode for the same link speed, you
will not get a warning message since scrambling does not affect the data path but only how the
data is written to the buffer.
104
Number of Segments
Number of Segments
field.
Trace Size
checkbox to enable scrambling. For PCIe ports, the
tab, and this setting is enabled by default.
to the 2.1250 (scrambling On) option to turn on the data
Link Speed
for the domain, you can reduce the
Trace Size
field.
field.
General Settings
Trace Size
. For example, if the
Number of
field.
Trace Size
Scrambling checkbox is on the
Xgig Analyzer User's Guide
for
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