EMC Connectrix ED-64M, User Manual

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Connectrix ED-64M User Guide
Monitoring and Managing the Director
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 — The number of invalid cyclic redundancy checks.
Failed CRC validation indicates that the frame arrived at the
director’s port corrupted. Frame corruption can 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 director
detected an unrecognized start-of-frame (SOF), an unrecognized
end-of-frame (EOF) delimiter, or an invalid class of service. This
indicates that the frame arrived at the director’s port corrupted.
This corruption can be due to plugging/unplugging the link, bad
optics at either end of the cable, bad cable, or dirty or poor
connections. Moving the connection around or replacing cables
can isolate the problem.
◆
Address ID errors — The number of address identifier 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 — The number of received frames that exceeded
the Fibre Channel frame maximum size or were less than the
Fibre Channel minimum size, indicating the frame arrived at the
director’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
Operational Statistics are:
◆
Offline sequences Rx — The number of offline sequences that
the port has received.
◆
Offline sequences Tx — The number of offline sequences that the
port has transmitted.
◆
Link resets — The number of link reset protocol frames
received/transmitted by this port from/to the attached device.
The director transmits a link reset to initiate the link reset protocol
or recover from a link timeout. This occurs normally to establish
BB_Credit or on any port in order to recover lost BB_Credit. The
director receives a link reset from an attached device if the device
wishes to initiate the link reset or recover from a link timeout.