fw 05.01.00 and sw 07.01.00 edge switch 2/24 product manager user guide

Monitoring and Managing the Switch
89Edge Switch 2/24 Product Manager User Guide
■ 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.