HP StorageWorks 2.32 Edge Switch - Manual (Page 68)

Monitoring and managing the switch 68
• Sync losses—A loss of synchronization was detected because the attached device was reset or
disconnected from the port. At the Hardware view, a yellow triangle is displayed to indicate a
link incident.
• Signal losses—A loss of signal was detected because the attached device was reset or
disconnected from the port. At the Hardware view, a yellow triangle is displayed to indicate a
link incident.
• Primitive sequence errors—An incorrect primitive sequence was received from the attached
device, indicating a Fibre Channel link-level protocol violation. At the Hardware view, a yellow
triangle is displayed to indicate a link incident.
• Discarded frames—A received frame could not be routed and was discarded because the
frame timed out (due to insufficient buffer-to-buffer credit) or the destination device was not
logged into the switch.
• Invalid transmission words—The number of times that the switch detected invalid
transmission words from the attached device. This indicates that a frame or primitive sequence
arrived at the switch’s port corrupted. This corruption can be due to the attached device
performing a reset, plugging or unplugging the link, bad optics at either end of the cable, a bad
cable, or a dirty or poor connection. Moving the connection around or replacing cables can
isolate the problem.
Some number of invalid transmission words are expected and acceptable. There are a number
of invalid transmission words within a frame used to produce the bit-error threshold link incident.
If one or more invalid transmission words are detected in 12 separate 1.5-second samples within
5 minutes, a bit-error threshold link incident is generated.
• CRC errors—A received frame failed a cyclic redundancy check (CRC) validation, indicating
that the frame arrived at the switch’s port corrupted. Frame corruption may be caused by device
disconnection, an optical transceiver failure at the device, a bad fiber optic cable, or a poor
cable connection.
• Delimiter errors—The number of times that the switch detected an unrecognized start-of-frame
(SOF) delimiter, an unrecognized end-of-frame (EOF) delimiter, or an invalid Class of Service.
This indicates that the frame arrived at the switch’s port corrupted. This corruption can be due to
plugging/unplugging the link, bad optics at either end of the cable, a bad cable, or dirty or
poor connections. Moving the connection around or replacing cables can isolate the problem.
• Address ID errors—A received frame had an unavailable or invalid Fibre Channel
destination address, or an invalid Fibre Channel source address. This typically indicates that the
destination device is unavailable.
• Frames too short—A received frame exceeded the Fibre Channel frame maximum size or
was less than the Fibre Channel minimum size, indicating that the frame arrived at the switch’s
port corrupted. Frame corruption may be caused by device disconnection, an optical transceiver
failure at the device, a bad fiber optic cable, or a poor cable connection.
Operational statistics
The operational Statistics that display for a selected port are as follows:
• Offline sequences Rx—The number of off line sequences that the port has received.
• Offline sequences Tx—The number of off line sequences that the port has transmitted.