HP StorageWorks 2/140 embedded web server user guide - Page 89
Primitive sequence errors, Discarded frames, Invalid transmission words, CRC errors, Delimiter errors
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Monitoring Products • Primitive sequence errors - Number of primitive sequence protocol errors received from an attached device, which indicates a Fibre Channel link-level protocol violation. • Discarded frames - A received frame could not be routed and was discarded because the frame timed out due to an insufficient buffer-to-buffer credit, or the destination device was not logged into the product. • Invalid transmission words - Number of invalid transmission words from an attached device. This indicates that a frame or primitive sequence arrived at the port corrupted. • 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 at the device, a bad fiber-optic cable, or a poor cable connection. • Delimiter errors - 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. embedded web server user guide 5-7
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