User manual

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McDATA Sphereon™ 4500 Fabric Switch Product Manager User Manual
Monitoring and Managing the Switch
• Delimiter errors
The number of times that the switch 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 switch’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
A received frame had an unavailable or invalid Fibre Channel
destination address, or an invalid Fibre Channel source address.
This typically indicates 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
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 following describes the Operational Statistics that display for a
selected port:
• Offline sequences Rx
The number of offline sequence that the port has received.
• Offline sequences Tx
The number of offline sequence that the port has transmitted.
• Link resets Rx
The number of link reset protocol frames received by this port
from the attached device. The switch receives a link reset from an
attached device if the device wishes to initiate the link reset or
recover from a link timeout.