FW 07.00.00/HAFM SW 08.06.00 McDATA Sphereon 4500 Fabric Switch Installation and Service Manual (620-000159-320, April 2005)

Diagnostics
4-27
• CRC errors - A received frame failed a cyclic redundancy check
(CRC) validation, indicating the frame arrived at the port
corrupted. Frame corruption may be caused by device
disconnection, an optical transceiver failure, 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), 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.
Class 2 Statistics The Class 2 Statistics include these transmit and receive values:
• Received Frames - The number of Class 2 frames received by this
F_Port from its attached N_Port.
• Transmitted Frames - The number of Class 2 frames transmitted
by this F_Port to its attached N_Port.
• 4-byte words Rx - The number of Class 2, 4-byte words received
by the port.
• 4-byte words Tx - The number of Class 2, 4-byte words
transmitted by the port.
• Busied Frames - The number of F_BSY frames generated by this
F_Port against Class 2 frames.
• Rejected Frames - The number of F_RJT frames generated by this
F_Port against Class 2 frames.