Status Leds (Led View) - Viavi Xgig User Manual

Monitor Views

Status LEDs (LED View)

The Status LEDs window (LED View) contains a Word/Byte LED and a Frame/Packet LED for
each port. If not all port LEDs are visible, increase the size of the window or use the scroll bar.
Words are the typical size of a unit of traffic in Fibre Channel, which are 32 bits that are encoded
to 40 bits on the wire. In SAS/SATA, the same quantity is referred to as a Dword. In Gigabit
Ethernet, the unit of traffic is a byte. All Ordered Set, Frames, Primitives, and Packets are made up
of words or bytes. Frames/Packets are structures that begin with SOF and end with a CRC and
EOF. The meaning of the LEDs for words and frames are shown below. These definitions apply to
the LED View, the LED Summary View, and the Resource Browser.
Table 9: Word and Frame Status LEDs
Word/Byte LED
Black
Red
Yellow
Green
Frame/Packet LED
Black
Red
Yellow
Green
Right-click the view to access the
Unselected error types (as configured within the
SAS/SATA Errors
status LED for a port. For example, if CRC errors are not selected, and the only errors discovered
for a port are CRC errors, the status light for that port will remain green.
The LED will stay red if the error condition persists. If the error condition stops, the LED will turn
to yellow instead of green. An example is shown in Figure 76.
To reset all LEDs from yellow back to all green, select
menu.
Xgig Analyzer User's Guide
Reason
No signal or no light, often a result of a disconnected cable or
unplugged SFP module
Signal with errors, for example, illegal characters, running
disparity violations, CRC mis-matches
Had an error in the past, currently no errors
Good signal, legal characters, proper disparity, good CRC if
present
Reason
No Frames detected
CRC mismatch error detected
Had a CRC error in the past, currently no errors
Frames with good CRCs detected
Preferences
tab of the dialog box) are not used in determining the value of a
Preferences
Chapter 10, Xgig Performance Monitor Configuration
dialog box.
tab, the
Frame Errors
Reset LEDs and Counters
tab, and the
Phy Errors
from the Edit
187