Chapter 9: Ethernet Cards
Standard Ethernet Features
SmartBits System Reference 129
Figure 9-3. How Triggers and Generated Errors are Displayed in Counters
Note: The Symbol error trigger is available only in SmartLib.
Figure 9-4. Legend for Error Frames and Counters
Legend for Error Frames and Counters:
T=Trigger
Definitions:
2. CRC error: Invalid checksum bit (A valid CRC requires 4 aligned octets)
3. Dribble bit error: 4 Bits are attached at the end of the frame after the CRC
4. Alignment error: 4 Bits are attached to the end of the frame data field before CRC
5. Symbol error: 4 Bits of symbol error encoding HEX codes inserted into the CRC
Other conditions:
6. CRC error + Dribble bit error => CRC + Alignment counters
7. CRC error + Alignment error => CRC + Alignment counters
8. Alignment error + Dribble bit error => CRC counters
9. CRC, Alignment error + Dribble bit error => CRC counters
10. CRC, Alignment error, Dribble bit error, and Symbol errors => CRC counters
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