HP 316095-B21 - StorageWorks Edge Switch 2/24 User Manual page 91

Monitoring and Managing the Switch
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
appears 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 appears
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 appears to indicate a link incident.
Discarded frames
A received frame could not be routed and was discarded because the frame
timed out (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, 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.
Invalid transmission words within a frame are 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 five minutes, a bit-error threshold
link incident is generated.
CRC errors
A received frame failed a cyclic redundancy check (CRC) validation,
indicating 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.
Edge Switch 2/24 Product Manager User Guide 89