Link Speed - Viavi Xgig User Manual

General Settings

Link Speed

The link speed and signal regeneration options allow the analyzer hardware to perform correctly in
your environment. The link speed must match the rate of your circuit under test and signals may
have to be retimed in some environments.
You must ensure that the link speed (data rate) is set properly before you start a capture or use the
Performance Monitor program. If you only use one speed on your network, you can set the speed
one time and not be concerned about checking the link speed when you start a capture operation.
Note: If your network requires you to change link speeds, you should verify that the link
speed is correct even if you have loaded a configuration file.
The link speed is set for a port-pair or all the ports in a link. You cannot set the link speed for only
a single port.
If you try to capture with the wrong link speed, you will notice red status for the B/W or F/P LEDs
in Port Status view.
The link speed setting for the analyzer ports affects the behavior of Xgig TraceControl and
Performance Monitor. If the link speed is set incorrectly in Xgig TraceControl, the Xgig
TraceControl and Performance Monitor will display red status LEDs and LOS traffic status for the
ports configured in the Xgig TraceControl.
To select the link speed, follow these steps:
1 Place the cursor in the
2 Select a rate or
pull-down menu in the
The Auto speed setting only detects link speed when the analyzer is idle. Once
Note:
a capture is started, the auto-detect feature does not change the current analyzer speed
if the link does change. The data rate will be fixed by the analyzer during capture.
Gigabit Ethernet Link Speeds
The link speed for the Xgig 1G Gigabit Ethernet blade is fixed at 1.2500 Gbps; no link-speed
options will appear for domains with Xgig Gigabit Ethernet ports.
Using the Xgig5000 10G 8 Port Gigabit Ethernet Blade as a 40G Analyzer
The link speed for the Xgig5000 10G 8 Port Gigabit Ethernet blade can be changed to 40G.
However, at 40G, this blade only supports the Analyzer function. The speed for this blade cannot
be changed in the Link Speed settings in the Configuration Editor. The
be selected in the
Ethernet blade as a 40G Analyzer, follow these steps.
1 From TraceControl's
chassis containing an 8 port 10G Ethernet blade. This blade must be licensed for 40G
Analyzer.
Xgig Analyzer User's Guide
Link Speed (Gbps)
Auto . For example, select the
General Settings
Select Ports for Domain Creation
Select Ports for Domain Creation
Chapter 4, Xgig TraceControl Capture Configuration
field.
2.1250 Gbps option from the
tab to set the link speed.
40G Analyzer
dialog box. To use the Xgig5000 10G
window, discover an Xgig5000
Link Speed
setting must
95